《单词讲解precautionval.ppt》由会员分享，可在线阅读，更多相关《单词讲解precautionval.ppt（3页珍藏版）》请在三一办公上搜索。
1、Precaution n.usually pl.sth.that is done in advance in order to prevent problems or to avoid danger 预防措施；预防；防备Still,the townspeople took all of the proper wartime precautions.尽管如此，那些市民们还是采取了各种适当的战时预防措施。Eg.I will keep the letter as a precaution.US navy did not take any precautions before Japan attack
2、ed on Pearl Harbor in 1941.precautionary adj.Eg.He was kept in the hospital overnight as a precautionary measure.为了谨慎起见，他被安排整夜留院观察。,Valid adj.(1)based on what is logical or true 符合逻辑的；合理的；有根据的；确凿的The person who said it had a valid point.说这句话的人有着合理的观点。Eg.The point you make is perfectly valid.你提出的论点完全
3、能站得住脚。The military strategy of using the rural areas to encircle the cities raised by Mao Zedong was valid against a background that enemy was strong in cities.,(2)that is legally or officially acceptable（法律上）有效的；（正式）认可的Eg.They have a valid claim to compensation.他们有要求赔偿的合法权利。She had valid reasons for not supporting the proposals.她有充分的理由不支持这些建议。validly adv.Eg.The contract had been validly drawn up.这份合同以依据法律草拟妥当。,
