偶然 一词用英语怎么说

1. occasionally
2. occasional
3. incidentally

例句与用法:
1. 他偶然说走嘴。
He had a slip of tongue by accident.

2. 我只是偶然抽一支雪茄。
I only smoke an occasional cigar.

3. 他偶然发现了这幅画。
He discovered the painting perchance.

4. 我们的相遇是很偶然的。
Our meeting was quite accidental.

5. 我偶然跟他闲聊, 一起说笑话.
He's someone I have an occasional chat and joke with.

6. 我遇见她完全是偶然的.
I met her quite by chance.

7. 我们（彼此）相遇纯属偶然.
We met (each other) quite by chance.

8. 我们只是在昨天才与她偶然相遇.
We met her only yesterday, as it happens.

accidental;
fortuitous;
chance;
adventitious;
occasional
by chance;
by accident;
inadvertently;
incidentally;
occasionally

occasionally
every now and then
ad hoc

on occasion

accidentally
occasionally
v. 偶然地

by accident/chance