...an encounter with a stranger... (Para. 2)
encounter: n. a meeting with someone that happens by chance
My meeting with my friend in New York was not an expected encounter. 在纽约遇到我的朋友是出乎意料的。
An encounter between you and the man you have hurt will not serve any good purpose. 与那位被你弄伤的人碰面是不会有什么好处的。
encounter: vt. meet or have to deal with (sth. bad, esp. a danger or difficulty)
The President was unwilling to encounter his judges. 总统不愿与法官们遭遇。
Even if he encounters a tiger his thinking ability usually enables him to kill the animal successfully. 即使他遭遇一只老虎，他的智力通常也能使他成功地把它杀死。