He is spending most of his time on a competition set in his robotics class.

他的大多数时间都花在班里举办的一个机器人大赛上。

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It was the first time in his life that Martin had travelled first class.

马丁是第一次坐头等舱旅行。

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It was the first time in his life that Martin had travelled first class.

马丁是第一次坐头等舱旅行。

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