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他手指上的刀痕是一把小刀割的。
The cut in his finger was from a knife.
youdao
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加工残留刀痕对轴的横向断裂起了促进作用。
The improper processing procedure also promoted the shaft broken.
youdao
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加工残留刀痕对轴的横向断裂起了促进作用。
The improper processing procedure also promoted the shaft broken.
youdao