Coordinates production scheduling, quality control, labor requirements, material requirements, and finished goods inventory.
协调排产，质量控制，劳动力需求，物料需求和成品库存。
Photonic crystals is a new type of optical material whose dielectric constant changes alternately following the coordinates of space.
光子晶体是一种介电常数不同的、其空间呈周期分布的新型光学材料。
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