红联英语单词
crown-rump-length
crown-rump-length什么意思,crown-rump-length翻译
基本解释
网络: 顶臀长度;头臀长;冠臀长
例句
The crown-rump length becomes less accurate after 12 weeks in determining gestational age because the fetus begins to curve.
孕12周后,因胎儿身体屈曲,以胎儿顶臀径推算孕龄已不够准确。