Language is for the exchange of idea, for communication.
语言是用来交换思想,用来交流的。
Dogs wave their tails not so much in, love to you as your bread.
狗摇尾巴,爱的是你的面包。
There are even stories of half-trained elephant calves who have refused to feed and pined to death when by some unavoidable circumstance they have been deprived of their own trainer.