1. expand vt.扩张; 使…变大
例句：He asked his teacher to expand on the steps of programming.
他要老师进一步阐述编制程序的步骤。

2. operate vt.操作; 经营
例句：Gradually she learned to operate a lathe.
她慢慢学会了开车床。

3. accident n.事故; 意外事件
例句：He denied that he was responsible for the accident.
他否认他应对那个事故负责。

4. believe vt.相信; 信任; 以为
例句：Whom should we believe?
我们应该相信谁呢？

5. capture vt. 俘获; 夺取; 夺得
例句：The bacteria can capture the energy for growth.
这种细菌能够为了增长繁殖而夺取能量。

6. require vt.需要; 要求; 想要
例句：Certain failures will require immediate attention.
有些故障需要立即引起注意。
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