乙基三苯基硅[烷]

Mr. President, Mr. Speaker, Members of the Congress of the United States: The gravity of the situation which confronts the world today necessitates my appearance before a joint session of the Congress. The foreign policy and the national security of

发表于:2018-12-04 / 阅读(301) / 评论(0) 分类 名人演讲

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro

发表于:2018-12-24 / 阅读(72) / 评论(0) 分类 Scientific American(三)月

This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ

发表于:2019-01-08 / 阅读(73) / 评论(0) 分类 Scientific American(四)月

AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be

发表于:2019-01-12 / 阅读(65) / 评论(0) 分类 2015年VOA慢速英语(七)月

AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin

发表于:2019-01-19 / 阅读(55) / 评论(0) 分类 2018年NPR美国国家公共电台12月

If you were going to a restaurant and wanted a healthier option, 如果你去饭店,你想吃得健康一点, which would you choose, grilled or fried chicken? 你会选择哪种食品呢,烤鸡还是炸鸡? Now most people would answer grill

发表于:2019-02-21 / 阅读(68) / 评论(0) 分类 TED演讲教育篇
学英语单词
absolute black
Abutilon indicum
angle of bow rake
arch piece
arth-goldau
automotive air conditioning
bird of paradise flower
blackstaff
cast iron ram
catalyzed sorption
clubmoss families
coeloblast
colup
composite rack
contact scour
cross-currency swap
croude
daystars
dihydrocoenzyme I
distribution resources planning
dobells
drive error pattern
duyanovich
ecometabolomic
electroacoustic source
emitter bias
ergastic material
excavator-type bulldozer
expert database system
food supply for manned spacecraft
frigefact
gonoforceps
graduated exercise
heir apparent
humano-
hydraulic drive locomotive
hydropolitical
ignified
inflations
ion exchange resin fines
Kepler solids
learning activities in schools
leetsdale
Libratar
Lirianthe championii
longwall undercutter
Lovett
lower limb myotome
manual toll switching system
Maritain, Jacques
medicinal benzene
membership cards
milli henry
monitoring station
multicommittee
nitrogen utilization rate
nonlifer
nose hair
nuclear radiation decomposition
object code program
optical parallel
ore crusher
page stone
parking disc
peripheral cam
person-centred
PHACOMP
potential barrier
pre-presses
pressure bonding
prewhitening
processes for synthetic ammonia
provolution
pseudaulacaspis takahashii
quantity factor
ratio photoreceptors subsequent neurons
reduce capacity
reduced size drawing
reptilian
rp-or
sack sewing machine
satin tops
side-shaft
smeariness
specific rotating power
spectral line shifts
sugar-beet lifter
sylvano
Tanitic
tank car dome
taylormade
timing signal
tiriths
under-pinned
unsensitively
variciscala reticulata
vasoreflex
voice morphing
water dispersion baking paint
wooden legs
zinc-air system