So to " run into" is to meet by accident.

所以“碰上”就是不期而遇。

We met by accident at a bar and we spoke because we were both drinking gimlets, Terry's favorite drink, but an uncommon one around here.

我们在一家酒吧偶然相遇并交谈， 因为我们都在喝 gimlets， 这是 Terry 最喜欢的饮料， 但在这里并不常见。

Two men obviously not Londoners, and with a touch of foreignness in their look, met by accident on one of the gravel walks leading across Hyde Park.

两个男人显然不是伦敦人，他们的表情带有一丝异国情调，他们在通往海德公园的一条碎石路上偶然相遇。