1 . In tennis you have to hit the ball before its ________ (第二次弹跳).(根据汉语提示完成句子)

2 . Some people know what they want to do from a young age, but many others just have a few ideas ________ ________in their heads.
有些人年轻时就清楚自己想做什么，但也有许多人只是有一些想法在脑子里晃来晃去。