?遭遇

encounter with 遭遇,遇到,如: His encounter with the guard dog had completely unnerved him. 他遇上了警卫犬, 把他吓坏了.

?遇到

... emphasis on 对...的强调，注重 encounter with 遭遇，遇到 end up with sth/doing sth 用...结束...

?碰到过

碰到过 ? Encounter with a 他人然和他的老朋友通过发邮件保持联系 ? Others so keep in touch with his old friend by email ..