未孕繁殖周期

试管婴儿有风险吗？

In the 24 years since the birth of Louise Brown，the world's first test－tube baby，thousands of would－be parents have been assure that as far as scientists knew there was no extra risk of genetic damage associated with in－vitro fertilization，

发表于:2018-12-05 / 阅读(33) / 评论(0)

有声杂志阅读

美国英语听力80篇2 Lesson28

[00:05.30]Seven environmental activists from all over the world have received this year's Goldman Environmental Prize. [00:15.39]The winners were awarded 125,000 dollars each by the Goldman Environmental Foundation. [00:24.24]The awards were announce

发表于:2018-12-26 / 阅读(69) / 评论(0)

美国英语听力80篇

Earth and Sky:Fire Cycle 火灾规律

Fire Cycle 火灾规律 The El Nino phenomenon of 1997-98 unleashed torrential rain in some parts of the world, while creating abnormally dry conditions in others. And it sparked record numbers of wildfires. Learn more about climate and wildfire -- toda

发表于:2019-01-02 / 阅读(126) / 评论(0)

(科普英语)Earth and Sky

Mare Reproductive Loss Syndrome

55 肯塔基州的母马不育症 DATE=6-7-01 TITLE=SCIENCE REPORT - Mare Reproductive Loss Syndrome BYLINE=George Grow (Start at 59

发表于:2019-01-30 / 阅读(68) / 评论(0)

科技之光

DEVELOPMENT REPORT - Reproductive

DEVELOPMENT REPORT – July 1, 2002: Reproductive Health Report 28 Jun 2002, 21:24 UTC This is the VOA Special English Development Report. A new report has been released about sexual and reproductive

发表于:2019-01-30 / 阅读(50) / 评论(0)

农业与发展

10 Worst States To Be a Woman

10 Worst States To Be a Woman State Republicans have introduced nearly 1,000 laws restricting women's reproductive health access. Here are 10 of the worst states to be a woman between puberty and menopause. In a time of war and record unemployment, t

发表于:2019-02-18 / 阅读(226) / 评论(0)

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学英语单词

abrasive cutting drilling

adjustable template

Airbnb

antispammer

availability declaration period

bill for remittance

breathe a sigh of relief