... afunction 机能缺失 age of sucking 哺乳期 age specific natality rate 特定年龄出生率 ...
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The effects of bacillus subtilis natto on the growth, performance and weaning age of sucking calves were investigated.
研究添加的纳豆芽孢杆菌对断奶前犊牛生长状况、生产性能、断奶日龄等的影响。
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The American Academy of Family Physicians says most children stop sucking their thumb by the age of four.
VOA: special.2009.03.11
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