罗斯林砂岩

The rock called sandstone is made up of a great many grains of sand. The beating of the rain on this rock washes the grains apart, and so the hard sandstone slowly changes into loose sand. 砂岩主要由大量沙粒组成。当雨水打下来的时候

发表于:2018-12-07 / 阅读(173) / 评论(0) 分类 英国学生科学读本

The Strange and Beautiful World of Arches National Park 犹他州拱门国家公园:奇怪而美丽的世界 This week on our national parks journey, we travel to Utah. The western state is home to several of the most popular national parks in Americ

发表于:2018-12-16 / 阅读(237) / 评论(0) 分类 2016年VOA慢速英语(十)月

AUDIE CORNISH, HOST: Sometimes good research can get done with a tool so simple a child could do it. For instance, scientists around the world recently set out thousands of fake caterpillars made from clay. NPR's Nell Greenfieldboyce explains why. NE

发表于:2019-01-17 / 阅读(144) / 评论(0) 分类 2017年NPR美国国家公共电台5月

Lesson 50 Only A Stone 第50课 只是一块石头 What is the oldest thing you have seen? One boy thinks it is a church, for he has seen a date on one which tells that it was built hundreds of years ago. 小朋友,你见过的最古老的东西是什

发表于:2019-02-13 / 阅读(194) / 评论(0) 分类 英国学生科学读本
学英语单词
1-triacontanol
3-way valve
access period
African music
Andrews' disease
aqua-blue
asetake
assails
assembly-line method
athelia
background spectrum
barium nitrite
bellingen r. (bellinger)
bottom-hole sampler
branch river
card box
centre tube
clutch cluster cone
contend for markets
cut sb to shreds
DDN NIC
DLCO2
dominating strategy
editorial assistant
epilobium angustifoliums
equilateral hemianopsia
Equity Market Neutral
error log
feratinum
First Triumvirate
fleshy mole
Flumazine
give the appearance of
gyri operti
hamatometacarpal ligaments
have a common purse
heat-checking
hogeous
hollow-cut
hostplant
hypocortisolism
inbeaming
independent culling level
input request
interception probability
isolated change
landrieu
lap seam welder
latent fingerprints
loading seguence
lower lock approach
lung vital capacity
luxariance (renner 1929)
matted wool
maximum voltage of overhead contact line
metal-poor star
module bus
Next Hop Resolution Protocol NHRP
Nicolaism
nodal increment
Nuaib
oboeist
operative procedures
ophitron
parallel sorting
Parapteropyrum tibeticum
PDA - personal digital assistant
playhouse
populates
porno-copia
postalbumin
predator
protective measure
prowl-car
punching position
quarry waster
quods
railroad train
recooked
resin bonded magnet
Saudi Arabians
sclerotsium rots
shoulder-hitter
sinhalas
sodium pentathionate
split compressor
Stra.
subscription calls
tanked it
tax-deeded
television display
thalictrum trichopus franch.
tiki tour
to clean
toil-worn
tolerable error rate
twin-cars
undifferentiability
Viled'
water spotting
worm spindle
zone constant linear velocity