首数(characteristic）珠算术语.指一个数目中的最高位上的数码.
adj. characteristic
... 直首 straight bow ; straight stem 首市 primate city 首数 characteristic of logarithm ...
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白鼻综合症(2006年首次记录)这种致死性疾病已经在美国东部杀死了不计其数的冬眠中的蝙蝠。
The deadly disease White-Nose Syndrome, which was only first recorded in 2006, has killed countless hibernating bats in the eastern U.S..
主题曲评选比赛从5月16日开始，截止上周四，候选歌曲数已压缩至10首，其中包括五首竞选阵营推荐的歌曲和五首网友推荐的歌曲。
The contest started May 16 and the number of songs was narrowed to 10 on Thursday - five initially suggested by the campaign and five write-in candidates.
为了评价首胎年龄和生育数与胰腺癌的发生可能存在的关系，作者做了以医院为基础的病例对照研究。
In order to evaluate a possible association between age of first parturition and the number of births and pancreatic cancer, we conducted a case control study with a hospital background.
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