Retracing my steps was certainly not an option.
回顾我的脚步并不是个办法。
We're retracing the route of a deep explorer mission.
我们将折回一个深入的探险路线中去。
Which figure CANNOT be drawn without lifting the pencil or retracing?
不用虚线和回描，那幅图不能被画出？
Which figure CANNOT be drawn without lifting the pencil or retracing?
不用虚线和回描，那幅图不能被画出？
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