Results show that under small Mach number the main source of discrete noise is the fluctuating force, which gives a guide for cutting discrete noise down.

研究表明，低马赫数情况下叶轮离散噪声主要是由脉动力造成，为降低低马赫数下的叶轮离散噪声提供了参考。

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The car cutting machine, the hand is simple said with gas cutting in the car and installation guide rail, to replace manual cutting.

小车切割机，简单说就是把手工气割具安装在小车和导轨上，用以替代手工切割。

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The white chalk dust goes through the holes in the paper and marks the wood so the carver has a visual guide to begin cutting.

用白色粉笔沿着纸洞描线，在木料上作出记号，这样，木雕师就有了参考样本，开始雕刻。

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Obviously, an assessment of its significance should guide any US consideration of reducing or cutting off that aid.

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Le Fooding concentrates on discovering and reviewing independent, authentic and often low-key restaurants, rather than Michelin-starred, white linen tablecloth-clad affairs, giving it a reputation for being cutting edge, contemporary and very much an insider guide.

BBC: Rooftop dining and dancing in Paris

Creating a digital guide to the world's highways and street addresses may be the cutting edge of technology, but it is also just long hours on the road.

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