Definition
复发 (fù fā) specifically means 'to recur/relapse' for an illness or bad habit — it's the word doctors use when a disease comes back. 反复 (fǎn fù) can also mean 'to recur' but is broader (repeatedly, back and forth) and can be an adverb; 重现 (chóng xiàn) means 'to reappear' for events/scenes, not necessarily negative.
verb
to recurto relapse (of illness, bad habits, etc.)
Examples
- 复发。Tā de jiùbìng yòu fù fā le.His old disease recurred again.
- ，复发。Yīshēng jǐnggào tā bú yào chōuyān, fǒuzé kěnéng fù fā.The doctor warned him not to smoke, otherwise he might relapse.
- ，复发。Tā nǔlì jiǎnféi, dàn hòulái háishì fù fā le.She worked hard to lose weight, but later relapsed.
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