His main activity after work is playing the drums in a band.
他工作之余的主要活动是在一个乐队里打鼓。
Even though training is not our main activity we will continue with it.
即使培训并非我们的主要工作，我们也要持续开展。
May ask questions or just talk to other children, but the main activity is simply to watch.
他们可能会提问或者和其他孩子说话，但是主要的活动就是看。
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