as it happens与by accident的区别

问题描述:

as it happens与by accident的区别

AS it happens
1. 恰好碰巧
2. 当那发生时
3. 碰巧,偶然
4. 实际上
by accident
1. 偶然
2. 是偶然
3. 偶然地,误;不经意
4. 偶然,无意中