The main advantage of powder metallurgy sintered gear is high precision, tolerance, low noise, good wear resistance, low cost, suitable for mass production.

粉末冶金烧结齿轮的主要优点是精度高，公差小、噪音低、耐磨性好、价格低廉，适合于大量生产。

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The volunteers were divided into four groups according to their body mass index (BMI) and glucose tolerance.

根据体重指数和葡萄糖耐量将志愿者分为四组。

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Superabundance of salinity in the soil imperils the growth of the mass of plants, especially does more harm to croppers which have lower tolerance to salinity.

土壤中盐份过多会危害大多数植物的正常生长，尤其对耐盐性较低的农作物危害更大。

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