The carpenter, to test the master, marked the spot and then pretended he had forgotten.

木匠想考考大师，在正确位置上作了标记以后，他假装忘了。

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Its energy saving effect was proved by on-the-spot test.

现场测试表明该技术节能效果良好。

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Its energy saving effect was proved by on-the-spot test.

现场测试表明该技术节能效果良好。

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