placental position的用法和样例：
例句
- Actually, the shape and height of a woman" belly during pregnancy is determined by her muscle tone and the position the baby is in.
不过实际上，孕妇肚子在怀孕期间的形状及高度是取决于孕妇腹肌的紧实度及腹中胎儿的胎位。 - It was unexpected because calves in this position are usually dead, asphyxiated by the acute flexion of the neck and the pressure of the dam's powerful contractions.
太不可思议了，因为这种胎位下，小牛通常会因脖子的大幅扭曲和母牛的强力收缩窒息而死。
