fall out of: 飞离,放弃
If you fall out of that tree and break you leg , dont come running to me.
如果你从树上掉下来摔断了腿,别跟我这哭哭啼啼的。
I fell out of my old habit.
我放弃了我的老习惯
run into: 偶遇
But at that size the ships run into problems.
但这样大的船将会遇到许多问题。
I unexpectedly ran into him on the street yesterday evening.
昨天晚上我在街上偶然碰见了他。
adj. 流行的,大众的,通俗的,受欢迎的