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A fetus of 20 weeks gestation or a fetus weighing 500 gm is considered abortus.胎儿孕周小于20周或胎儿体重小于500克的称为流产胎....
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abortus的音标：abortus的英式发音音标为：[ə'bɔ:təs]abortus的美式发音音标为：[ə'bɔtəs]...
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A fetus of 20 weeks gestation or a fetus weighing 500 gm is considered abortus.胎儿孕周小于20周或胎儿体重小于500克的称为流产胎....
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n.流产儿...
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abortus的音标：abortus的英式发音音标为：[ə'bɔ:təs]abortus的美式发音音标为：[ə'bɔtəs]...
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n.流产儿...