到他40多岁时,他希望已经实现职业目标。

By the time he is in his 40s, he hopes to have achieved his career goals.

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By the time he is in his 40s, he hopes to have achieved his career goals.

in 在这里表示"处于某个年龄段或时期"。 his 是代词 he 的所有格形式,表示"他的"。 40s 是 forty 的复数形式,表示"40多岁"的年龄段,指40-49岁之间。 in his 40s 这个短语表示"在他40多岁的时候",指40-49岁这个年龄段。

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