flare up

US /fler ʌp/
UK /fler ʌp/
"flare up" picture
1.

燃起, 突然燃烧

to suddenly start burning more brightly or intensely

:
The campfire suddenly flared up, sending sparks into the night sky.
篝火突然燃起,火星飞向夜空。
The dry brush flared up quickly in the strong winds.
干燥的灌木丛在强风中迅速燃起
2.

发作, 爆发

to suddenly become worse or more intense (especially of a disease or problem)

:
Her asthma tends to flare up during allergy season.
她的哮喘在过敏季节容易发作
Old tensions between the two countries could flare up again.
两国之间的旧有紧张关系可能再次爆发