例句：We substituted John for Bill at first base.
      第一垒我们让约翰代替比尔。

2.additional adj.增加的, 额外的, 另外的

例句：Passengers have to pay additional charges for their extra luggages.
      旅客们超量携带的行李要额外付费。

3.productive adj.富有成效的; 有益的

例句：We had a productive meeting that solved some problems.
      我们开了一个富有成效的会议, 解决了一些问题。

4.adoption n.采取,采纳,采用;通过

例句：They argued him into the adoption of the plan.
      他们说服他采纳这项计划。

5.gradual adj.渐渐的；逐渐的；逐步的；渐进的

例句：The doctor noticed a gradual improvement in his patient.
      医生注意到病人在逐渐恢复健康。
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