他一口喝下一小杯朗姆酒。

He downed a shot of rum in one gulp.

他更喜欢小口喝咖啡，而不是一口喝下去。

He prefers to sup his coffee rather than gulp it down.

食虱鸟要和河马比赛，谁能一口喝最多的谁。

Tickbird challenges Hippo to a contest - who can drink the most water in a single gulp.