[化] 使用期限; 有效期限

life span的用法和样例:

例句

  1. The machine's life is very long.这机器使用寿命很长。
  2. Women have a higher life expectancy than men.女人比男人的预期寿命长。
【近义词】

发表于:2018-12-13 / 阅读(142) / 评论(0) 分类 Wee Sing America

If we went with Bob's philosophy, I think we'd actually end up with a more efficient immune system. 如果我们同意鲍勃的观点,我们实际上肯定了一种更为高效的免疫系统 And efficiency is always important in the short term. 而且

发表于:2019-01-18 / 阅读(36) / 评论(0) 分类 TED演讲科学篇

AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- we talk with the author of a book called Spanglish: The Making of a New American Language. RS: Ilan Stavans is a professor of Latin American and Latino Culture at Amherst Colleg

发表于:2019-01-18 / 阅读(68) / 评论(0) 分类 英语单词大师-Word Master

Long Live Us About a century ago, the average life-span for Americans was about 50 years. Today, the typical American lives for around seventy-eight years. According to a German aging study, the maximum life span in industrialized countries has incre

发表于:2019-01-26 / 阅读(30) / 评论(0) 分类 英语听力文摘 English Digest

A Chinese entomologists has found a giant mosquito with a wing span of 11.15 centimeters. Zhao Li, curator of the Insect Museum of West China, said the mosquito, which belongs to the world's largest mosquito species Holorusia mikado, was found in Aug

发表于:2019-02-14 / 阅读(50) / 评论(0) 分类 2018CRI中国国际广播电台

Life Extension May Add Just Bad Time Living longer doesnt necessarily mean living better. Thats the lesson from the tiny roundworm called C. elegans, long a workhorse in basic biology lab work. The research is in the Proceedings of the National Acade

发表于:2019-02-14 / 阅读(34) / 评论(0) 分类 2018年科学美国人3月
学英语单词
active coating
after-shows
air cylinder
anisidide
atresia ani vaginalis
authorized investments
autochemogram
awhere
Bechuanas
bottom flue
braider
Bremm
bridging the gap
bronchoscopical
Burckhardt's corpuscles
character based
chin-chin
chrome tungsten steel
Chāh-e Rāh
Clear Lake Res.
columnar sales book
compare notes
concordias
confess to doing sth.
cylindrical die
Czar Alexander I
Delrac
devictimized
dynamic combination
e idol
electro-optical viewing system (evs)
estraterrestrial body
exhaust driven gas turbine
explain oneself
external pressure flange
fine comminution
fish scrap
flinch one's glass
fluorolube
Fourier's law
fucknuts
gas testing
gilled radiatol
goat's wool
grade-six
home-care
hyff
hypnotisable
impanelments
inimicitiously
installation disk
insulator cleaning car
irresolvableness
karyolysis (auerbach 1874)
laibons
level type angle gauge
Mariinskiy
mcga
memory pointer
mesaticephaly
micro-ohms
minney
musculus zygomaticus
mussitating
NC machine
nonoperational mode
open the ball
ore terminal
orthochlorophenol
palolo
pathogenic factor
planetary house
pressure diagram during nonheating period
propylene glycols
rank defect
red heat
reflecting satellite
relief-
scale -down
sealed contract
ship channel
siliceous glaze
spider pelvis
stertors
storage screen
sudden infant death syndrome(sids)
terminal badge reader
thalirevolutine
Thiele's syndrome
tobman
tout ensembles
turbulent convection
UK Infrared Telescope Facility
unlaws
unreplicated
untangibly
victulling vessel
von Neumann entropy
wire basket
wire line jar
zibilske
ZTIP(2nd-order tangential in-phase)