Ultrasonic testing has been widely used in the testing of material and products for its simple operation and high reliability.

由于其具有操作简单、可靠性高等特点，在材料和产品的检测中得到了广泛的应用。

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Testing of material nano-scale mechanics and nano-materials mechanical properties is the important content of nano experimental mechanics.

材料纳观力学特性与纳米材料力学特性的测试是纳米实验力学的基本内容。

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Designers spent more than one year choosing and testing ideal materials, and finally picked a new kind of material that can resist the very difficult conditions on the Moon.

设计师们花了一年多的时间选择和测试理想的材料，最终挑选出一种能够抵御月球上异常恶劣条件的新型材料。

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And the team at Goddard Space Flight Center was testing extremely small amounts of material.

VOA: special.2009.09.30

Last week, the company announced the beginning of preliminary metallurgical testing of material at the Freegold Mountain Project.

FORBES: Northern Freegold To Continue Growing Freegold Mountain Project - Burges

More thorough testing was carried out - including the DNA testing of raw material at Comigel's factory - and the results were confirmed on Wednesday.

BBC: UK

"This has included reviewing the procedures followed when treating Mr Pritchard, taking statements from and screening of all staff involved in his care, and testing of the injection material, " the statement said.

BBC: NEWS | UK | Wales | North East Wales | Man contracted MRSA after jabs