1、The gymnast had to do a double back flip
這個體操運動員得做一個360度后空翻。

2、As she forget to take her purse with her, she had to double back to get it.
她忘記帶鐵夾，只好返回去取。

3、It ruins a book to double back the pages as a bookmark.
把書頁折起來當作書簽用會把書弄壞的。

4、Had to double back to touch the missed base.
必須緊急轉(zhuǎn)身回頭觸壘

5、The roads leading to the most beautiful places always twist and turn and double back on themselves.
通往最美麗的地方的路總是曲曲折折而且有時候不得不返回起點。

6、The gymnast had to do a double back flip.
這個體操運動員得做一個360度后空翻。

7、As it grows outward, it runs out of room and is forced to double back into a horseshoe shape.
隨著它向外生長，空間擴大，增大為以前的兩倍，成了馬鞋的形狀。

double back翻譯