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1·He mentioned en passant that he was going away.

他顺便提到他要离开。《牛津词典》

2·Tradition wants the walker, en passant in front of a cairn, to add a stone, his stone, to enrich the landmark.

Tradition为石质stackings希望学步车，中文在前面的山顺便，添加一块石头，他的石头，丰富的地标。

3·There is a unique chess rule which involves a special move in chess that many casual players are not aware of, the rule is called en passant.

顺便有一个独特的国际象棋的规则，涉及一个特别行动在国际象棋，许多休闲玩家不知道，规则是所谓的“顺便”。