un. 短周期彗星

This is Scientific American's 60-Second Science. I'm Karen Hopkin. Thisll just take a minute. Any school kid can tell you that comets are made of ice. That frozen water burning off is what gives comets their characteristic tails. But asteroids were g

发表于:2018-12-02 / 阅读(155) / 评论(0) 分类 Scientific American(四)月

[00:00.00]Lesson 14 Comets [00:02.60]彗星 [00:05.20]In recent scientific investigation of comets has increased [00:14.16]because of a growing interest in the origin of the sun and planets. [00:17.63]近年来,由于对太阳和行星的起源兴趣

发表于:2018-12-08 / 阅读(121) / 评论(0) 分类 赖世雄学英语第四册

So, enough scientists in other disciplines are really asking people to help, and they're doing a good job of it. 足够多的科学家在其它领域正寻求大家帮忙,而且大伙也干的不错。 For instance, there's eBird, where amateur bir

发表于:2018-12-19 / 阅读(97) / 评论(0) 分类 TED演讲教育篇

This is Scientific Americans' 60-Second Science, I'm Chelsea Wald. Got a minute? Remember the good old days when we understood our solar system? Then we found out Pluto wasn't a planet. And now a new study puts comets in question. The data come from

发表于:2018-12-24 / 阅读(119) / 评论(0) 分类 Scientific American(一)月

【句子对照】 You knucklehead! How could you have mixed the dog food with the cereal? 你这个笨蛋!你怎么会把狗食和谷类混到一块呢? 【关键俚语】 knucklehead 英:A stupid person 中:笨蛋

发表于:2018-12-27 / 阅读(151) / 评论(0) 分类 美国常用英语俚语

安德鲁和哈皮今天讨论的话题是潮流和趋势,来看看这两者有什么区别吧 Andrew: Well, today we are going to do a Chatterbox episode. And a Chatterbox episode is where we discuss a topic and just have a cool discussion about t

发表于:2018-12-27 / 阅读(109) / 评论(0) 分类 话匣子英语

This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? Earth's surface is dominated by oceans. But where did all that water come from? Asteroids and comets smashing into the early Earth have long been thought to be a promisin

发表于:2019-01-08 / 阅读(145) / 评论(0) 分类 Scientific American(十)月

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? The Apollo moon missions ended almost 40 years ago. But for lunar scientists, they're gifts that keep on giving. Researchers studying rocks brought back by ast

发表于:2019-01-08 / 阅读(136) / 评论(0) 分类 Scientific American(一)月

Comet 彗星 Do you know what a comet is? 你知道彗星是什么吗? A comet is an object in the solar system. 彗星是太阳系中的天体。 It travels around the sun like the planets. 它像其它行星一样绕着太阳转。 Then, why don'

发表于:2019-01-10 / 阅读(118) / 评论(0) 分类 与美国小学生一起学英文第11册

STEVE EMBER: Im Steve Ember. SHIRLEY GRIFFITH: And Im Shirley Griffith with EXPLORATIONS in VOA Special English. Today we tell about an American spacecraft that has a date with a comet. We hear the latest about a Space Shuttle commander whose wife co

发表于:2019-01-12 / 阅读(141) / 评论(0) 分类 2011年VOA慢速英语(二)月

Sleeping and Dreaming of Comets From VOA Learning English, this is Science in the News. Im Jim Tedder. And Im Caty Weaver. Today, we tell how sleep helps to keep our brains healthy. We have a report about what South African researchers are calling Ea

发表于:2019-01-12 / 阅读(198) / 评论(0) 分类 2013年VOA慢速英语(十一)月

One Minute of Exercise May Be All You Need 每天一分钟运动有益健康 There is good news for people who think they do not have time to exercise. 对于那些认为自己没有时间运动的人来说,这是个好消息。 A group of research

发表于:2019-01-12 / 阅读(106) / 评论(0) 分类 2016年VOA慢速英语(五)月

ESA Spacecraft to Land on a Comet 欧洲航天局探测器登录彗星 After a long flight through deep space, a European Space Agency probe is finally approaching its target - a comet millions of kilometers away from earth. Scientists say the missio

发表于:2019-01-14 / 阅读(110) / 评论(0) 分类 VOA标准英语2014年(七月)

By Mike O'Sullivan Los Angeles 03 July 2006 A large asteroid, known as 2004 XP14, raced past the Earth early Monday. Scientists say it posed no threat to the planet, but serves as a reminder of the hazards encountered in space. -------- The rocky sp

发表于:2019-01-20 / 阅读(180) / 评论(0) 分类 2006年VOA标准英语(七月)

Itsremarkable how we are able to build up this picture of whats going on millionsof miles away in the solar system. Its one of the joys of science really, justalmost like a detective picking up on those tiny clues to tell a bigger story. Sothat the b

发表于:2019-01-23 / 阅读(130) / 评论(0) 分类 探索与发现2014年

Its been said that the first person on Mars is alive somewhere on earth today. Imagine its you. What do you need to know? How much you get there? What should you pack? What are some of the must-see sights and what should you avoid? Think of this as y

发表于:2019-01-26 / 阅读(118) / 评论(0) 分类 自然百科2012年

[6] One group, led by John Matese, professor of physics at the University of Louisiana at Lafayette, confirms the notion that it is most likely to be a brown dwarf, a star that never accumulated enoug

发表于:2019-01-26 / 阅读(139) / 评论(0) 分类 阅读空间

But let's pretend again that we have made it to the Oort cloud. The first thing you might notice is how very peaceful it is out here. We're a long way from anywhere nowso far from our own Sun that it's not even the brightest star in the sky. It is a

发表于:2019-01-29 / 阅读(96) / 评论(0) 分类 万物简史

A short period of gorging on junk food has a more permanent effects on body size and the way it stores fat even after the initial weight is lost, the study found. The gluttony changes fat mass the percentage of fat in the body for more than two years

发表于:2019-01-31 / 阅读(93) / 评论(0) 分类 阅读空间

The Oort cloud is a spherical haze of comets that surrounds our entire solar system. We often get the false impression that the solar system ends with Pluto. In fact, beyond Pluto is the Oort cloud, encircling everything else like an enormous shell.

发表于:2019-03-06 / 阅读(149) / 评论(0) 分类 英语时差8,16
学英语单词
a-shelf
A. P. S.
abstract variety
adventuresome
aging sisht
automatic computer
barmy
barosmin
bering times
betula nigras
buck for something
bull-dogs
cacodox
candlehour
Carex bilateralis
Carsphairn
cockups
compot
computer-on-module
constant expense
Coproporphyrinogenase
counterdistinct
critical-pressure ratio
de bene esse
design control
diminished-radix complement
Disk Drive Overlay
disk valve
dissociator
dumb-bell bone (or dumb-bell-shaped bone)
Eganville
electric wave technology
ELF communication
eliminations ledger
entocoele
ephedrine hydrochloride
exaltingly
exostosis of external auditory canal
falls in love
file title
fixed-point part
Frashëri
genus solenostemons
gone through the mill
gravity pressure sprinkler system
high speed rewind
holding chuck
joint sealing material
let me be frank
linear partial differential equation with variable coefficients
local car
loss severity
lycopodium powder
Ma-lipa
machine gun mike
marquench rolling
maximum activity limit
mesenterium dorsale commune
narrow-gap welding
noh
nongonococcal
on top of sth
one package stabilizer
orgya
outreachings
palo cortado
paralysis of superior oblique
pentaborane 9
Peristrophe montana
phenological season
plotland
postal course
pressurization gas connection
protect status
purulencies
put sb through the mill
quincentenaries
reduced view
ringing slot antenna
Rose of China
Sama, R.
schizolysigenous cavity
search engine submission
select mode
single pass conversion
single-casing
slab shed tunnel
solid-state calculator
south-east formosan red-bellied tree squirrel
spring-backed oil ring
swinging stagging
technology-image gap
thylacines
transubstantiation
trickless
tricolour
visible spectro-photometry
visitors regulation
West Central District
wide-screen film
xlix
ztigmatometer