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1.step down 辞职，下台，走下
例句：Asked to run for public office, Cronkite reportedly said he could not step down from his anchor post.
当他被要求去竞选官职时，他一遍遍地表示自己不能从自己的主播台上走下来。
2.tighten its belt 紧缩开支
例句：While the rest of Europe is forced to tighten its belt, Germany appears to be coasting through the crisis.
在欧洲其他国家被迫紧缩开支的时候，德国在危机中似乎是毫发无损。
n. 安全，防护措施，保证，抵押，债券，证券
