固体推进剂火箭

CRA-JAH! CRA-AWK-NEF,! Teddy croaked. Teddy was speaking Raven now, but Jack understood him perfectly. Teddyhad said, So+qV, Jackand Annie! Annie stepped forward. Sh, fluttered to the windowledge and perched with Teddy. GRA-QUORK! shecroaked. That's

发表于:2018-12-10 / 阅读(53) / 评论(0) 分类 汪培珽儿童英文分级书单《神奇树屋》

By Scott Stearns Dakar 21 October 2009 Women in Mali are encouraging more men to use condoms to slow the spread of the virus that causes AIDS. The prevalence of HIV/AIDS in Mali is low for West Africa, effecting less than two percent of the adult po

发表于:2019-01-14 / 阅读(41) / 评论(0) 分类 VOA标准英语2009年(十月)

By Zulima Palacio Washington 22 April 2008 Deep into the mountain state of West Virginia, a group of volunteers is determined to restore nature the way it was a century ago, before mining, logging and fires changed the landscape. To do so, thousands

发表于:2019-01-25 / 阅读(45) / 评论(0) 分类 VOA常速英语2008年(四月)

The land-speed record 地面速度记录 How to build a 1,000mph car 怎样建造时速1000英里的汽车 Hybrid rocketry will be used to drive faster than ever before 混合火箭技术将用于更快地驱动车辆 May 5th 2011 | from the print ed

发表于:2019-01-26 / 阅读(47) / 评论(0) 分类 经济学人综合

Spraying Insecticide Indoors Reduces Spread of Malaria Researchers in West Africa have shown that spraying insecticide indoors can dramatically reduce malaria transmission. Efforts to develop a malaria vaccine have so far been disappointing, so progr

发表于:2019-02-12 / 阅读(92) / 评论(0) 分类 VOA标准英语2011年(十月)

The first rockets were Chinese. In the 1230s the armies of the Song dynasty, 首批火箭出现在中国。十三世纪三十年代,宋朝军队 who were fighting Mongol invaders, started launching fire arrows propelled by gunpowder some 300 metres

发表于:2019-02-16 / 阅读(50) / 评论(0) 分类 经济学人科技系列
学英语单词
-in
abortees
adult tooth
arms sideward with forearms inward
blue ocher
blusing
brussels griffons
bryogenin
bugialli
case involving a claim for alimony
cat and dog life
Christian Coalition
circular lens transfer function
cockling
creep rupture strength
cryptovirogenic
cumulative time-series
desoxalic
diamond model
distance-time graph
enuresis
factory-mades
fitter's tool
fitting stand
flanking moraine
flesh lump
flood-light projector
fluid deicer
footballer
Goyena
haematopathology
hangiri
heat distortion temperature
hippoboscas
hot cell manipulator
Hututu
HWM,h.w.m.
intermediofacial nerve
interval estimation
isopromenthazine
keyboard-enhanced pda
king-nut
landruff
lenero
leptura mushana
lifecasting
Liouville theorem
macromedaeus distinguendus
marketable on grown fish
Mercs
metallized paper condenser
miniardize
minimum integration
monsey
morcelation
Nea Apollonia
nonhematopoietic
objettrouve
obliterations
oil-skin
open-reel
panel molding
pleco
Polyalthia chinensis
primer pheromone
profile peak
program-described data
respigon
rice corn
Richina
rights and duties
rykov
salution
Saros Adalarι
secondary additional marking
semecarpus cuneifomis
Silicomonazite
single-loop learning
sliding vane rotary flowmeter
sollicitudo
spheroidzation
spotty steel
steam-cylinder assembly
succeed in one's object
talk some sense into somebody
temporarily surplus funds
trachyneis brunii
transposition skin flap
transverse magnetoresistance
Trouton's coefficient of viscous traction
Ts cell
umbrella structure
undercrowding
uplift
upshot heater
utility frequency of Chinese character
waste cloth
weak-focusing magnet
worker's information system
wrangleth
Xanthoceras sorbifolia Bge.
Zoraya