At the same time, some of the same or higher hardness material, such as diamond, corundum, metal oxide, quartz crystals are likely to damage the material.

同时一些硬度相同或更高的物质，例如钻石、刚玉、氧化金属、石英水晶都有可能损坏这些材料。

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A basic variety of aluminium oxide, white colour its hardness is higher and toughness slightly lower than that of a.

刚玉的基本品种，白色，与棕刚玉相比，硬度高、性稍低。

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These reported methods for preparing oxide and sulfide nanomatrials usually require multi-step, higher temperature, special apparatus and rigorous conditions.

已有制备氧化物及硫化物纳米材料的方法往往需要较多的步骤、较高的温度、特殊的仪器、苛刻的实验条件。

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The latest data from the WMO also shows that emissions of nitrous oxide are 20% higher than in the preindustrial era, and are accelerating.

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Igzo (indium gallium zinc oxide) screens have higher translucency than standard TFT (thin film transistor) LCDs, meaning they are better at letting light pass through them.

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It was found that nitric oxide was linked to a higher rate of brain haemorrhage in the most premature babies - 2.2 pounds (1, 000 grams) or less.

BBC: NEWS | Health | Relaxant 'helps premature babies'