I had a persistent cough for over a month.

我持续咳嗽已经一个多月了。

《柯林斯英汉双解大词典》

I have a persistent cough.

我咳嗽不断。

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He has a persistent cough.

他不断地在咳。

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A persistent cough may be the sign of a serious condition.

持续的咳嗽可能是一种严重的情况的表现。

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Various pollutants and irritants in the air can cause a persistent cough.

空气中的污染物及致敏物可能导致持续性的咳嗽。

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Various pollutants and irritants in the air can cause a persistent cough.

空气中的污染物及致敏物可能导致持续性的咳嗽。

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