The unit tests at the base of the pyramid are important for several reasons.
在金字塔底部的单元测试很重要，这有几个理由。
The internal structure of silica has a pyramid(tetrahedron) unit.
硅的内部结构是一个四面体。
Samples of blended coal ash were taken from the boiler of a power plant 700mw unit. Their softening temperature was measured by a pyramid method on an intelligent ash-melting point measuring device.
从某电厂700MW机组锅炉取混煤灰样，在智能灰熔点测定仪上采用角锥法对其进行软化温度测定。
The pyramid prism array includes a plurality of pyramid units, and each pyramid unit provides a cone-shaped surface;
角锥棱镜阵列包括多个角锥单元，每一角锥单元提供一锥状表面。
The pyramid prism array includes a plurality of pyramid units, and each pyramid unit provides a cone-shaped surface;
角锥棱镜阵列包括多个角锥单元，每一角锥单元提供一锥状表面。
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