She gulped down a mouthful of coffee.

她咽下了一大口咖啡。

《柯林斯英汉双解大词典》

Last, the father lets her drink a mouthful of coffee.

最后，父亲让她喝了一口咖啡。

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Then he put on the cup, drank a mouthful of coffee inside.

然后他又端起杯子，喝了一口里面的咖啡。

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Then he put on the cup, drank a mouthful of coffee inside.

然后他又端起杯子，喝了一口里面的咖啡。

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