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小测验：选择正确的单词
- 论坛新贴
backtrack ['bæktræk]
基本释义
- vi. 返回,退走,撤退,放弃
词形变化
- 时 态：back·tracked, back·track·ing, back·tracks
英英解释
1个动词解释
- retrace one's course
[同] double back, backtrack, turn back
[例]- The hikers got into a storm and had to turn back
- retrace one's course