This machine is used to perform leather bending test . After testing for a certain period of time , observe the leather if cracks or breaks to judge the quality of leather .

本机系用来测试皮革屈曲特性，在屈曲规定的次数后，取下试件，观察其龟烈或受损情形，据以判断皮革的品质。

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So theresearchers needed a method to enhance cracks—similar to the way human graderssqueeze the egg along the crack to see if it opens.

因此，研究人员需要一种增大裂缝特征的方法——就跟分级员沿着裂缝挤压鸡蛋，看它是否裂开的方法相似。

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Use fireplaces only if the chimney has no damage and no cracks.

除非确定烟囱没有受损，也没有裂缝，否则不要使用壁炉。

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Thanks to a closed capital account (even if cracks are appearing) and government control over domestic banks, China has been able to buy vast quantities of dollars without fuelling inflation.

ECONOMIST: Currencies

But, if he cracks through and wins the Masters, he may well get another one this year before he turns 38 in December.

FORBES: Masters Win Would Complete Amazing Comeback For Tiger Woods

If there are cracks in the system, Mr Montesinos will certainly try to exploit them.

ECONOMIST: The old spymaster in the dock at last