1.
dependent upon or characterized by chance.
偶然决定的或偶然性。
2.
The quality or condition of being fortuitous.
偶然性,偶然偶然发生的性质或状态
3.
extrinsic circumstances
偶然的事情[情况]
4.
(statistics) attributable to chance.
（统计学）归于偶然。
5.
I trod on his foot by accident.
我偶然踩了他的脚。
6.
be the case by chance.
偶然地成为某个事件。
7.
Some liabilities are contingent.
有些债务是偶然发生。
8.
I met him by pure chance.
我完全是偶然碰到他的。
9.
the account was circumstantially accurate.
这个计算是偶然准确的。
10.
Their marriage was quite accidental.
他们的结合是偶然的。
11.
Knock up against an old friend
偶然遇见一个老朋友
12.
I came across her yesterday.
昨天我偶然遇见她。
13.
He met an old friend by chance.
他偶然遇见一个老朋友。
14.
a clerk I chanced to meet.
偶然遇见一位营业员。
15.
a businessman I chanced to meet.
偶然遇见一位商人。
16.
a doctor I chanced to meet.
偶然遇见一位医生。
17.
a teacher I chanced to meet.
偶然遇见一位老师。
18.
I happened on him in the street.
我偶然在街上遇见他。