contract 名词：contract (with sb) (for sth/to do sth) 合同; 契约: You shouldn't enter into/make a contract until you have studied its provisions carefully. 你应该先仔细研究合同的条款，然後再签订。动词：contract with sb for sth 与某人签订（合同或契约）: contract with a firm for the supply of fuel 与一家公司就供应燃料一事签订合同。contract `out (of sth) 退出或不参加某合约: You can contract out (of the pension scheme) if you wish. 你愿意的话，可以退出（这个养老金计划）。
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