There's been a lot of debate about whether the UN should withdraw its troops from the country.关于联合国是否应该从这个国家撤军的问题，仍存在许多争议。

Once in court, he withdrew the statement he'd made to the police.一到法庭上，他却收回了向警方所做的供述。

withstand vt.承受，抵住

The training that astronauts receive teaches them how to withstand the hazards of space exploration.宇航员所接受的培训，让他们学会广如何抵御太空探测的危险。

witness vt.目击；为…作证 证人

The lady witnessed the murder.那位女士目击了凶杀案。

John and Anne served as witnesses to the signing of the contract.约翰和安妮担任了签署合同的见证人。

wonder n.奇迹；惊奇 vt.对…感到惊奇，想知道

Mount Everest is one of the natural wonder of the world.珠穆朗玛峰是世界上的自然奇观之一。

I wondered how he could finish so much work during a short period.我想知道，他是如何在这么短时间内完成这么多工作的。

worship n./v.崇拜，膜拜 v.敬神

He was the hero worshiped by the younger children.他是孩子们崇拜的英雄。

Tom worships at the temple every Sunday morning.汤姆每周日上午都去寺庙拜神。

worthwhile adj.值得的，值得花时间、金钱或精力的

It may someday be worthwhile to try to recover uranium from seawater, but at present this process is prohibitively expensive.或许有一天值得尝试从海水中回收铀，但目前这种工艺的成本还是太过高昂。

wrap vt.裹，包，捆

He wrapped his handkerchief round his bleeding finger.他用手絹把流血的手指包了起来。

wreck n.失事；失事的残骸 vt.失事

The divers found a wreck on the seabed.潜水员在海床上发现广一艘沉船的残骸。

The ship was wrecked when it hit the rocks in a storm.船在暴风雨中撞上了岩石，结果失事了。

yawn n.哈欠 vi.打哈欠

He yawned and fell asleep.他打了个哈欠，然后睡着了。

yield v.①生产；产生②放弃；投降 n.产量；收益

The cow won’t yield much milk.奶牛不怎么产奶了。

The child pleaded，but the parents wouldn’t yield.孩子不断恳求，但家长就是不让步。

An experienced farmer can estimate the annual yield of his acres with surprising accuracy.—个有经验的农民可以估算出自己农田的年产量，而且准确度高得惊人。