Upon seeing the tear in the painting I shed a tear又是啥意思?

Upon seeing the tear in the painting I shed a tear又是啥意思? She preformed the sign of the cross upon seeing the same skull that had frightened Jill. unwise to jump the conclusion upon seeing and hearing things 是什麼意思 upon+doingsoon you are going to have to move out,cried my neighbor upon seeing the largest tomato plant.这里的upon seeing怎么解释?（别用翻译机器翻给我啊,这样我也会的） tear tear tear tear tear tear tear off the slip是什么意思 Tear The Roof Off 歌词 Wish Upon The upon the earlier The smile has buried tear's pride. Once upon the time 是什么意思 unleashed upon the 如题 upon seeing the shadow of a pigeonUpon seeing the shadow of a pigeon,one must resist the urge to look up.这句据说是孔子说的,哪位童鞋可以讲讲,它对应的原话是什么呢?哈哈，确实是那个视频，我也是多处查找，确