heat up

phrasal verbphr v

a) HOTto become warm or hot, or to make something become warm or hot （使）變熱，（把…）加熱

The stove takes a while to heat up.

爐子要過一會兒才能熱起來。

heat something ↔ up

I heated up the remains of last night’s supper.

我把昨天晚飯剩下的飯菜熱了一下。

b) DIFFICULTif a situation heats up, it becomes dangerous or full of problems 〔形勢〕激化，加劇，惡化

Examples from the Corpus

heat up• The stones heated up in the sun.• As the gas heats up, it expands.• While the oven is heating up, prepare the sauce.