In the study of optical properties of low class crystal system, the identification of optic sign has important meaning to unknown crystal and mineral determination.

在低级晶族光学特性的研究中，光性符号的确定对未知晶体及矿物的鉴定有着重要的意义。

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The cost growth and efficiency falling of labor resource in China result from surplus of low class labor force and lack of high class labor force in industry distribution.

我国劳动资源成本上升和效率下降正是产业分工低端劳动资源过剩和产业分工高端劳动资源数量不足的具体体现。

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Why not set it up so departments inside companies can champion a class of low-income kindergarteners, setting aside college money (in the form of equity in their own company) for whomever stays on to finish high school?

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Like Rikyu before him, Koetsu worked with a family of potters whose name came to stand for a whole class of rough, low-fired pottery: raku ware.

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When the perceived risk of an asset class is low, the expected return is also low relative to more risky asset classes.

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