在他四十几岁时，他开始学英语。

In his forties, he began to learn English.

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在他三十几岁时，就成了一名成功的商人。

When he was in the thirties, he became a successful businessman.

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在他三十几岁时，就成了一名成功的商人。

When he was in the thirties, he became a successful businessman.

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