有效半排出期(由有机体内排出放射性同位素),有效半衰期

There are six characteristics of speech, all of which are vital to speak effectively. In this section we'll look at each of them separately. These speech characteristics are basically important to you

发表于:2018-11-28 / 阅读(122) / 评论(0) 分类 疯狂英语2001年

BY STEPHEN R .COVEEY The first habit is 1)proactivity. Be proactive. The word proactivity is fairly common in management literature, but you won't find it in the dictionary. It means more than merely

发表于:2018-11-28 / 阅读(146) / 评论(0) 分类 疯狂英语2001年

By Melinda Smith Washington 31 August 2007 Centuries ago doctors used hypnosis to help relieve the excruciating pain of surgery. It then fell out of favor with the introduction of anesthesia. Now as VOA's Melinda Smith reports, new studies show a hos

发表于:2018-12-16 / 阅读(86) / 评论(0) 分类 2007年VOA标准英语(八月)

By Jessica Berman Washington 14 May 2008 Researchers have determined that commonly prescribed triple-drug combination therapies that use old antiviral drugs are the most effective for suppressing the deadly virus that causes AIDS. The findings have m

发表于:2019-01-09 / 阅读(56) / 评论(0) 分类 VOA标准英语2008年(五月)

By Carol Pearson Washington 28 March 2007 watch Stent Study report A new, landmark study finds heart stents devices used to open blocked arteries - may not be as effective in the long term as medication in preventing heart attacks. VOA's Carol Pears

发表于:2019-01-13 / 阅读(80) / 评论(0) 分类 2007年VOA标准英语(三月)

GUY RAZ, HOST: I want to ask you about this really famous Talmudic notion - actually, it might be that in the Quran as well - but this idea that, you know, if you save a single life, then you have saved all of humanity. You know that one? PETER SINGE

发表于:2019-01-17 / 阅读(42) / 评论(0) 分类 2017年NPR美国国家公共电台5月
学英语单词
4-bromoaniline
acetylchitobiose
acnode
actinoblast
agitated vessel
Alpino
alternating-current/direct current
analytic mechanics
apparatus for transformation by drawing
backlash unit
bearbaitings
billetted
bos primgenius
brewis
brownfield site
californium oxide
Cypripedium cordigerum
Dacian Wars
dashboard dining
dege filter
denotational semantics language
Diandranthus nepalensis
dynamic flowmeter
entericoid fever
fakhro
feed pattern
finite resource
fissionable material management
fluobenzoic acid
Forchhammerite
forms of capital
four freedoms
fovea superior
frequency driven design
gadzuric
Gentiana Tourn.ex L.
gold-miner
gwenda
Gymnogyps
hand-me-down
heavily-guarded
highway tunnel
honests
howtowdie
iliensis
Iménas
integral detector
intercast
jelliff
K-convex function
kaonium
kelvin helmholtz contraction
knee upward
leonors
leuco dye
lifetime of variable
line numbering
linenberger
maid's hair
maximum likelihood stochastic language
measse
mend with
metal hack saw
microwave phase equlaizer
muchematein
multiple operator welding machine
multistachys
nonendurance
nonvolatil
nosh-up
oxdiazole
phellem
piston compressor
plastimo
profiting
prototyper
pump submersible
qm.
quasi-organism
relational DBMS
Schur index of an irreducible representation
scuba
segment rack
self clearing car
Shaphan
small-talked
spectacle blank flange
suaeda asparagoides makino
supernickel alloy
tabulated reserves
tampes
time-area-concentration diagram
tipped off
total obscuring power
transcurrent segment
troublingly
udesky
uhlmann
Ukedo-gawa
wellhead for drilling
westem
Wiltshire Horn