As the baby suckles, a further supply of milk is generated. 婴儿吮吸时,会有更多的奶水流出来。
Koala in a tea cup: Nestled into a cup, with his tiny paws clasping the edge, this happy koala called Raymond contentedly suckles on a tiny bottle. 茶杯里的考拉:坐在杯子里用爪子紧紧抓住边缘,这只名叫雷蒙德的快乐小考拉心满意足地吸吮着奶瓶里的奶。
A nogtail slips into a pigsty and suckles an ordinary pig; 矮猪怪偷偷地跑进猪圈,吃一头普通猪的奶;
When baby suckles, messages are sent to your brain which then releases two hormones: prolactin and oxytocin. 当婴儿吮吸时,信息就会被传输到大脑里,而大脑便释放出两颗荷尔蒙因子,那便是泌乳素和催产素。