音标:[spɜ:m sel] ;
精细胞
词型变化:名词复数形式 : sperm cells

sperm cell的用法和样例:

例句

  1. A sperm cell develops from a sperm mother cell.精细胞从精母细胞发育而成。
  2. Only one sperm fertilizes an egg.只有一个精子使卵子受精。
  3. The mate deposits sperm in the queen's sperm sac.带翅的雄性蚁把精子存到蚁后的卵囊中。
【近义词】

By Caty Weaver Broadcast: July 25, 2003 This is Bill White with the VOA Special English Environment Report. Researchers say they have found a way to reduce the cost of some 1)fuel cell production. The

发表于:2018-12-01 / 阅读(166) / 评论(0) 分类 VOA2003(下)-环境与健康

柯灵思英语-英语听力高手38

发表于:2018-12-07 / 阅读(90) / 评论(0) 分类 柯灵思英语

[00:00.00]Albert Einstein communist Alexander Bell professor [00:05.00]艾伯特爱因斯坦 n.adj.共产主义者(的)亚历山大贝尔 n.教授 [00:10.00]ruler scientific darkness shy [00:14.79]n.统治者 adj.科学的 n.黑暗 adj.害羞的 [00:

发表于:2018-12-13 / 阅读(231) / 评论(0) 分类 高中英语词汇

RACHEL MARTIN, HOST: A wide-ranging study shows that sperm counts are plummeting throughout the Western world, and scientists don't know why. NPR health correspondent Rob Stein suggests some of the potential reasons. ROB STEIN, BYLINE: In Margaret At

发表于:2018-12-17 / 阅读(106) / 评论(0) 分类 2017年NPR美国国家公共电台7月

Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On this Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm an

发表于:2018-12-27 / 阅读(83) / 评论(0) 分类 英语听力广播—Listening

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

发表于:2018-12-30 / 阅读(148) / 评论(0) 分类 国家地理2008年

What Is Progeria? Progeria was first described in the nineteenth century. The mysterious disease is often thought of as premature aging. Children with progeria are normal for their first year of life, but then develop medical problems normally seen i

发表于:2018-12-31 / 阅读(72) / 评论(0) 分类 英语听力文摘 English Digest

Egg Cells 卵细胞 Do you know what an egg cell is? 你知道什么是卵细胞吗? An egg cell is necessary for reproduction. 卵细胞是繁殖的必要条件。 Animals have egg cells. 动物有卵细胞。 Then does every animal have egg cells

发表于:2019-01-10 / 阅读(112) / 评论(0) 分类 与美国小学生一起学英文第10册

By Carol Pearson Washington 25 September 2007 A lot of people wonder about the impact cell phones might have on their health. And now a new study shows that heavy mobile, or cell, phone use may result in hearing loss. VOA's Carol Pearson reports. As

发表于:2019-01-11 / 阅读(133) / 评论(0) 分类 2007年VOA标准英语(九月)

By Bill Rodgers Washington 19 May 2008 Cell phones are an example of what is sometimes now called leapfrog technology, a product that allows developing nations the benefits of a reliable and extensive communications network without the heavy investme

发表于:2019-01-13 / 阅读(102) / 评论(0) 分类 VOA标准英语2008年(五月)

Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On todayss Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm

发表于:2019-01-26 / 阅读(94) / 评论(0) 分类 英语听力文摘 English Digest

By Victoria Cavaliere New York 16 October 2007 An annual stem cell research conference in New York has been bringing together some of the field's top scientists to discuss breakthroughs in stem cell research and what proponents call its long-term app

发表于:2019-01-31 / 阅读(123) / 评论(0) 分类 2007年VOA常速英语(十月)

By Paul Sisco Washington 17 April 2008 Federal regulators in Washington have approved plans to upgrade the nation's Emergency Alert System to include text messages to cellphones and other mobile devices. VOA's Paul Sisco has more in this Searching fo

发表于:2019-01-31 / 阅读(123) / 评论(0) 分类 VOA常速英语2008年(四月)

Beijing, Sept. 6 (Xinhua) -- A sperm donation scandal disclosed recently has aroused growing concern in the United States. According to the New York Times' report, Ryan Kramer, the son of a donor, found that he has more than 150 half-siblings - they

发表于:2019-02-04 / 阅读(116) / 评论(0) 分类 英语新闻

WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo

发表于:2019-02-04 / 阅读(250) / 评论(0) 分类 英语新闻

Turn Off Your Cell Phone 关掉你的手机 We went to the movie the other night. I sat in an aisle seat as I usually do, because it feels a little roomier. Just as the feature was about to start, a blonde from the center of the row got up and starte

发表于:2019-02-07 / 阅读(230) / 评论(0) 分类 趣味英语

By Jessica Berman Washington 19 December 2007 Stem cell research was the major medical and science story this past year, topping the list of achievements that experts say might finally lead to cures for many diseases. Meanwhile, global health officia

发表于:2019-02-17 / 阅读(133) / 评论(0) 分类 VOA常速英语2007年(十二月)

WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified(鉴定) a human lung stem cell that is self-renewing and capable of forming and integrating multiple bi

发表于:2019-02-18 / 阅读(180) / 评论(0) 分类 英语新闻

Our bodies are amazing. Although things go wrong at times, it's remarkable they work at all when one considers the complexities of their operation. Don and Ya?l present some awards to a few of the outstanding components. [APPLAUSE] D: Good evening, Y

发表于:2019-02-23 / 阅读(78) / 评论(0) 分类 英语时差8,16

In mammals, the sex of a baby is determined by the combination of chromosomes it inherits from its parents. Nearly every cell in a male body has two different sex chromosomesone is shaped like an X and one is shaped like a Y. Females also have two se

发表于:2019-03-06 / 阅读(134) / 评论(0) 分类 英语时差8,16
学英语单词
aerodynamic factors
Aldeatejada
analogue aerodynamics
at the slope
automobil receiver
bean-flicker
benzoclidine
bubble departure diameter
carrier by water
collision relaxation
conservant
contract pressure base
conventional duty
cotans
curstest
daphne tangutica maxim.
DC three-wire insulated system
dehypnotising
dependency benefit
dermal epithelium
diamminepalladium(ii) chloride
double malaria
ductus endolymphaceus
early-year
eddering
ekasilicon
extremiss
fer-de-lances
floating found ation
flode
get on sb's wick
get-well
halyard block
Hwemun
income difference
inspire
jaehne
kajikia audax
kindbergia arbuscula
light-stability
Louisa County
Lubie, Jezioro
lysimachia vulgariss
main air compressor
mankin
mechanical caging
metacarpal veins
metalloorganic compound
montenvers
nesslerized
New Tazewell
nonfat solid
numbering among
odor destruction
origin recognition complex
parajournalists
parathyroid carcinoma
partes lacrimalis
peynado
placebolike
plunderbund
poshekhonov
posterior median septum
postradioembolization
postsnap
pure cellulose
putty-like polymer
quidditches
range flag
recorded-delivery
revenue reserve
rwandans
scabbard trachea
search-and-rescue
second cosmic velocity
self-opening reamer
service element
Sistan
sonix
squirrel-sized
stalagmometric
Stanton, Edwin McMasters
stud arc welding
subclass synapsidas
subcritical boiling
subordinate load
tabernamontanain
tape-loop
time shipment
todhunters
tozers
tractor mounted sprayer
tritoniss
tropical continental climate
uninterrupted series of endorsement
virtual circuit interconnect
vision-mixer
weedwhacker
whitlockites
woopie