润滑作用能减少噪音和磨损.Lubrication reduces noise and wear.齿轮必须适当地加油润滑.Gear must be properly lubricated.芦荟用于润肤霜中，使之具有美妙的丝般润滑感。Aloe Vera is used in moisturisers to give them a wonderfully silky texture....
The aphid is now laying waste to the wheat and barley fields.蚜虫正在毁掉一片片的小麦和大麦田地。The caterers were already laying out the tables for lunch.负责餐饮的人已经在为午餐摆桌了。They are prolific breeders, with many hens laying up to six eggs.他们...