The milk is discharged by the mammary glands in the Breasts. Hormones triggered by delivery of the placenta and by nursing stimulate milk production.是什么意思_The milk is discharged by the mammary glands in the Breasts. Hormones triggered by delivery of the placenta and by nursing stimulate milk production.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句