Both singing and playing an instrument are complex activities in which errors are easily detected, and which require both intelligence and muscle control to do well.

唱歌和演奏乐器都是复杂的活动，在这些活动中，错误很容易被察觉，而且要做好它们需要手脑并用。

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Both singing and playing an instrument are complex activities in which errors are easily detected, and which require both intelligence and muscle control to do well.

唱歌和演奏乐器都是复杂的活动，在这些活动中，错误很容易被察觉，而且要做好它们需要手脑并用。

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