Lactogenesis
生乳, 乳生成
🗣️ 情景例句
I'd like your help.
我要请你帮忙。
It is lost labour to sow where there is no soil.
没有土壤，播种也是徒劳。
It was stolen twenty years ago when Dan was a boy of fifteen!
这是20年前丹还是一个15岁的孩子时被人偷走的！