1. His interest in photography is only a passing fad.
   他对摄影的兴趣只是一时的爱好罢了。
2. I feel his passing in a very personal sense.
   对于她的逝世我个人感到非常悲伤。
3. We're passing the oldest buildings in the city.
   我们正经过这城市最古老的建筑。
4. Two cars locked together in passing.
   两车交会时互相卡住了。
5. He mentioned in passing that he had been there once.
   他顺便提到他曾经到过那里一次。

　1个副词解释