Full bridge topology was used in the main circuit, IGBT was used as power switching device, and micro-crystal core was used in mid-frequency transformer.

其主电路采用全桥式拓扑结构，以IGBT管为功率开关器件，中频变压器使用微晶磁心。

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The core of each sphere is a crystal of lithium iron phosphate. This acts as a standard battery material.

球体的核心是一组磷酸亚铁锂晶体，这相当于标准电池材料。

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The changes of amyloplast and amyloplast DNA in different development stages were also observed, indicating the relationship among the amyloplast core, crystal structure and the amyloplast DNA.

又系统观察了在不同发育时期淀粉体及淀粉体dna的变化，揭示了淀粉体dna与淀粉核心、晶体结构的关系。

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At the core of the device is a photonic crystal slide which basically turns the iPhone into a high-resolution spectrometer.

ENGADGET

One example the company has developed is a crystal fibre that squeezes light into such a narrow core that the intensity of the light modifies the optical properties of the glass itself.

ECONOMIST: A new approach to making optical fibres

In the same way, the pattern of holes in a crystal fibre can create the equivalent for light of a graphite core and a diamond cladding.

ECONOMIST: A new approach to making optical fibres