"in one bite" in Chinese (Simplified)
一口一口气（比喻）
Definition
一次把食物吃完，不分几口。有时比喻一次性做完某事。
Usage Notes (Chinese (Simplified))
多用于食物，强调惊讶或一口吞下的本领，也常用作比喻。口语表达，不正式。如“他一口吃掉了那个苹果”。
Examples
He ate the apple in one bite.
他把苹果**一口**吃掉了。
The cookie was so small she finished it in one bite.
饼干太小了，她**一口**就吃完了。
Try not to eat your sandwich in one bite.
尽量不要**一口**吃完你的三明治。
I can't believe you just ate that burger in one bite!
我不敢相信你刚才把那个汉堡**一口**吃掉了！
Some people try to solve all their problems in one bite, but it's better to take small steps.
有些人想**一口气**解决所有问题，其实慢慢来更好。
That piece of cake is huge—I doubt anyone could eat it in one bite.
那块蛋糕太大了——我怀疑有人能**一口**吃掉。