Time is of length but can't be retraced.
有长度但是不能追溯其源头，这就是时间。
Copies of lost pattern pieces can be retraced from the original draft.
丢失了拷贝纸样、衣片，还可以从样板原图上重新复描。
To determine this position is the basis on which cylindrical form errors can be retraced.
合理确定其位置，是圆柱度形状误差重构的基础。
To determine this position is the basis on which cylindrical form errors can be retraced.
合理确定其位置，是圆柱度形状误差重构的基础。
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