a bite to eat
...have a bite? 你要不要吃ㄧ口阿? However, if u say "Have a Bite to eat" means more like let's go eat some food or have a small meal. ex: ...
... takes a bite of the apple.（他嚐了一口那蘋果。） 而 have a bite to eat 和 have a bite 雖然意思上都是「去吃一口」，但是後面接的詞會不太一樣...
He vanished a couple of times to grab a bite to eat and check in on the going ons at top deck. 他走開了２次...