downs head中文什么意思

例句与用法

1. it stopped so short that he was about to fall down head over heels
   马停得太突然了，他几乎从马背上翻下来。
2. he turned over and went down head first, swimming with all his strength and all his will
   然后身子一栽，脑袋朝下往下钻去。他竭尽全部的体力和意志力往下钻，越钻越深了。