?偶然地

... fortuitous adj. 偶然的，意外的 fortuitously adv. 偶然地，意外地 fortunate adj. 幸运的 ...

?可好

可贵 to be treasured 可好 luckily; ; fortuitously 可见 clear; visible; it can clearly be seen (that this is the case); it is (thus) clear ..

?意外地

... fortuitously 偶然地; 意外地 fortum vial 注射用复达欣 fortuitous variation 偶然变异 ...

?凑巧

凑巧 fortuitously; as chance has it; luckily 答辩 to reply (to an accusation); to defend one's dissertation 分辩 to explain the facts; to ...