1. finish eating; eat all of 吃光
Make sure the children eat their vegetables up!一定要讓孩子們把蔬菜吃光。
After working all afternoon,we quickly ate up all of the dinner.我們整整幹了一個下午以後,一會兒就把飯吃光了。
2. use all of;consume用完;消耗
Extravagance ate up his inheritance. 奢侈的生活耗盡了他繼承的遺產。
The central heating eats up a lot of electricity. 暖氣耗費大量的電力。
Idle talk had eaten up the hour before they knew it. 閒談不知不覺地把他們的時間都耗掉了。
3. destroy as if by eating;distress 毀壞;使苦惱 The mountain flood ate up many buildings. 山洪衝毀了許多建築物。
What's been eating him up lately?近來他為什麼一直在苦惱?
The heavy and monotonous job ate him up. 繁重而單調的工作使他苦惱煩悶。