fertility ratio的用法和样例：

例句

They are the only possible means of dealing with excessive fertility.它们是解决人口出生率过高这一问题的唯一手段。
But whatever the cause, it seems to mean fertility rates can overshoot downwards.然而不管原因是什么，看起来都表示人口出生率下降过头了。

数学英语 26 What is the Golden Ratio

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(115) / 评论(0)

数学英语

VOA标准英语2011-Asia Experiences Huge Birth-Rate Decline

Approximately 6.6 billion people populate the earth today, with an estimated 3.7 billion living in Asia. But over the past 50 years, economic and social modernization in the region has been accompanied by a remarkable drop in birth rates. Sociologist

发表于:2019-01-14 / 阅读(60) / 评论(0)

VOA标准英语2011年(一月)

Working Shifts Can Harm Women's Fertility

Schools in north China's Shanxi Province have been banned from organizing overseas study tours for profit after a plane crash killed two Chinese girls in San Francisco. The provincial education department announced the ban in a statement issued on Tu

发表于:2019-01-19 / 阅读(41) / 评论(0)

世界各地新闻集锦

60秒科学:Antioxidants and Male Fertility

Guys, heres another reason to eat your veggies: they might be good for your sperm. Some studies show that male fertility and whats called seminal quality have declined over the last few decades. So researchers from two fertility clinics in Spain loo

发表于:2019-01-30 / 阅读(88) / 评论(0)

60秒科学

China cuts its reserve ratio again

BEIJING, May 13 (Xinhuanet) - China's central bank announced on Saturday it would lower the reserve requirement for commercial lenders by 50 basis points, the second time it has taken such action this year to inject more market liquidity and shore up

发表于:2019-02-04 / 阅读(82) / 评论(0)

英语新闻

日本政府关注本国孩子出生率

According to the Washington Post of September 26, Japan's government has been paying more attention to the nations fertility rate, which influences the country's economic development。 The coastal region of Fukui has Japan's biggest share of dual-in

发表于:2019-02-18 / 阅读(55) / 评论(0)

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学英语单词

ASEAN Free Trade Area

Asian tiger mosquito

Ataq

atomic(al)

be provoked beyond endurance

burei

cerebra