汤姆四岁时开始学手风琴。

Tom began the accordion four.

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当他还是个孩子的时候就开始学手风琴了。

He began to learn the accordion when he was a small boy.

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我妹妹四岁时开始学拉手风琴。

My little sister began to learn the accordion four.

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我妹妹四岁时开始学拉手风琴。

My little sister began to learn the accordion four.

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