用厨房的剪刀剪电线会使它变钝。

Using the kitchen scissors for cutting wire dulled them.

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这把刀已经因使用多年而变钝了。

This knife has been blunted by years of use.

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切削刀具一开始变钝就须重新打磨。

Cutting tools must be reground at the first sign of dullness.

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如果你用刀砍铁丝，会使刀锋变钝的。

If you cut the iron wire with a knife, you'll blunt its edge.

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这些刀保证不会变钝。

These knives are guaranteed never to go blunt.

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在工业上，激光被用来作为锯和钻头，而且它永远不会变钝。

In industry, lasers are the saws and drills that never get dull.

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在工业上，激光被用来作为锯和钻头，而且它永远不会变钝。

In industry, lasers are the saws and drills that never get dull.

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