偶然

1. accidental; fortuitous; chance

♦ ~事故 an accident

♦ ~现象 accidental (or fortuitous) phenomena

♦ ~误差 accidental error

2. accidentally; by accident; by chance

♦ ~遇见一位老朋友 run into an old acquaintance; come across an old friend; meet an old friend by chance

3. once in a while; occasionally

♦ 他不经常来, ~来一次。 He does not come very often; he comes once in a while.