| 释义 |
double back- 往回走，顺原路折回(或逃走)：
The escaped boy doubled back on his tracks. 那个逃跑的男孩突然循原路折回。 She doubled back to see if she could find the missing watch. 她顺原路折回看看能否找到丢失的手表。 - 把…对折，折叠；把…反折：
It ruins a book to double back the pages as a bookmark. 把书页折起来当作书签用会把书弄坏的。
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