I restrict myself to one cup of coffee a day.

我限制自己每天只喝一杯咖啡。

《牛津词典》

For some people, just one cup of coffee a day can become habitual.

对一些人来说，每天只喝一杯咖啡已经成为了一种习惯。

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I drink one cup of milk a day.

我一天喝一杯牛奶。

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I drink one cup of milk a day.

我一天喝一杯牛奶。

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