Elephants wear the tusk down faster than they can grow it.象牙磨损的速度快于生长的速度。A huge tusk decorated the wall of his study.他书房的墙上装饰着一支巨大的象牙.The narwhal's single, spiral tusk has always been a mystery.独角鲸那独一无二的螺旋状尖角总是被视为神秘...
他用手抹了抹嘴，然后打了个响亮的饱嗝。He wiped his hand across his mouth, then belched loudly.那些男人, 吃得直打饱嗝, 解开了背心的钮扣.The men, gorged with food , had unbuttoned their vests.不能在别人面前打饱嗝.In front of the others can't burp....