[yī kǒu]
（表示口氣堅決） with certainty; readily; flatly
readily agree; readily promise
一口答應
flatly deny
一口否認
flatly refuse
一口回絕
assert categorically; accuse definitely
一口咬定
speak idiomatic English
講一口地道的英語
a bite of cake
一口蛋糕
take a nip of whisky
呷一口威士忌
We have not had a bite today.
今天我們一口飯都沒吃。
He wants to eat it up at a mouthful.
他要一口把它吃掉。