那样的一次失败会令你警觉起来，开始思考。A defeat like that makes you sit up and think.我尽量不让自己紧张，或者表现得非常警觉。I tried not to tense up, or become obviously wary.他们政治上非常警觉。They are politically very aware....
a hoary old joke老掉牙的笑话They discussed the hoary old problem.他们讨论老问题.Without a word spoken, he hurried away, with his hoary head bending low.他什么也没说, 低着白发苍苍的头, 匆匆地走了....
Environmental groups have given a guarded welcome to the Prime Minister's proposal.环保组织对首相的提议表示谨慎的欢迎.The accident is already shaping up as a significant environmental disaster.这次事故已经造成严重的环境灾难。A surprising number of ...