1. 尿道大多數哺乳動物自上尿液從膀胱中排出體外的管道，雄性的精子可從中排出
   The canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male.
2. 那份報告是有關哺乳動物的體溫調節(jié)。
   The report is on mammalian thermoregulation.
3. 鯨魚和馬一樣都是哺乳動物。
   A whale is no less a mammal than a horse is.
4. 猴子和狗都是哺乳動物。
   Monkeys and dogs are mammals.

哺的英語翻譯：

乳的英語翻譯：

動物的英語翻譯：