谈到他时，她拭去了脸上的泪水。She brushed away tears as she spoke of him.我假装拭去一只眼睛里的沙粒。I pretended to rub a fleck of grit from one eye.他用餐巾拭了拭嘴唇。He dabbed at his lips with the napkin....
The pistons are graphite-coated to reduce friction.活塞上涂了一层石墨以减小摩擦力。Some pistons have seating rings of metal or leather.有些活塞上有金属或皮革的密封环.A pump uses valves and pistons.泵使用阀和活塞....
The mother provides the embryo with nourishment and a place to grow.母亲为胎儿提供营养和成长的空间。Sugar gives quick relief to hunger but provides no lasting nourishment.糖能快速缓解饥饿感，但不能提供持久的营养。To help provide essential nourishment, we�...
Many of Britain's beaches fail to meet minimum standards of cleanliness.英国许多海滩连最起码的卫生标准都达不倒。Imagine long golden beaches where you can wander in solitude.想象一下那长长的金色海滩吧，在那里你可以独自徜徉。Some beaches had failed to comply wit...