He looked up and happened to see a person putting his hand into another passenger's trouser pocket.
He looked up and happened to see a person putting his hand into another passenger's trouser pocket.
他抬起头来，碰巧看到一个人把手伸进一位乘客的裤兜。
He looked up and happened to see a person putting his hand into another passenger's trouser pocket.
他抬起头来，碰巧看到一个人把手伸进一位乘客的裤兜。