By using piezoresistive resonators the need for an external crystal can be avoided, enabling greater integration and lower costs.
通过使用压阻式谐振器，可以避免需要使用外部晶体，这允许更大的集成以及使成本更低。
The external quantum efficiency of photon crystal(PHC) structured LED is calculated.
对光子晶体结构的外量子效率进行了计算。
The nano crystal is purified and then dispersed in the external aqueous phase to form the contrast agent for intravenous injection.
纳米晶经纯化后分散于外水相中，得到可静脉注射的造影剂。
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