单词讲解precautionvalid.ppt

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 attacked 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。