您要查找的是不是：
- But she added: "We think the sex ratio at birth is probably peaking now. 但是她补充道：“我们认为新生儿男女比例问题已经达到了顶峰。
- The sex ratio at birth not only shows in different childbearing orders but also in regional distribution. 出生性别比偏高不仅表现在分孩次的差异上，而且还表现出了明显的地区分布特征。
- What happens to the sex ratio at birth if fertility is maintained at a low level depends on the evolution of son preference. 如果生育率维持在低水平上，出生性别比的前景取决于男孩偏好的演化。
- According to the censuses of our country in recent three decades, the sex ratio at birth increased gradually, and in some areas, was in serious imbalance. 我国近年来人口普查资料表明，出生性别比有逐年升高趋势，某些地区已呈现明显失衡状态。
- Objective To estimate the sex ratios at birth for perinatal child in hospital in Hubei. 目的了解湖北省住院分娩围产儿的出生性别比。
- In our country, the sex ratio at birth has appeared a series of characters and a new situation of keeping increasing, which has already been a serious social problem needed to be solved imminently. 我国自1980年代以来，出生性别比呈现出持续升高的态势和一系列特征，已成为迫切需要解决的严重的社会性问题。
- The unbalance sex ratio at birth is ”a tragedy of the commons” from the angle of the publics. 从公众的角度看可以认为中国今天的出生性别比失衡是一场“公共地悲剧”。
- Terence H. Hull(1990), Recent Trends in Sex Ratio at Birth in China. United Nations, Economic and Social Commission for Asia and the Pacific. 解振明(2004):《出生性别比偏高明年起将出现男子娶妻难》;《北京青年报》;7月13日.
- the Sex Ratio at birth 出生性别比
- Remarkably high sex ratios at birth have been observed recently in Asian populations. 高出生性别比常常发生在亚洲的人口中。
- China, as all we know, has been obsessed by High Sex Ratio at Birth (SRB) for years and the attention it attracted is getting much wider as time elapsed, from the academe to almost all the people. 摘要我国出生性别比偏高的问题近几年愈演愈烈，被广泛关注的范围已经从学术界扩大了整个社会。
- A Study of Sex Ratio at Birth among Children Born Between 1910 and 1969 高龄老人1910-1969年间出生子女性别比的研究
- Hatchling sex ratio at this beach possibly depends on the date of egg laying. 雉龟的性别比则可能受到产卵的时间所决定。
- The paper uses the index of sex-selective abortion to indicate the effect intension of sex-selective abortion on the raising of the sex ratio as birth. 文章以“性别人流指数”为量化指标具体反映中国的性别选择性人工流产对出生性别比升高的影响强度。
- High sex ratio at birth 性别比偏高
- The baby weighed seven pounds at birth. 那婴儿出生时重七磅。
- sex ratio at birth 出生性别比
- Imbalance of Sex Ratio at Birth 出生性别比失调
- They see the decline in the sex ratio during this period as one of the key contributors to modern feminism. 他们视这段期间的男女比例下滑现象，为促进现代女性主义的关键因素之一。
- the higher sex ratio at birth 出生性别比偏高
