Due to the prodigious proportion of medium and big electronic equipment in power line, the research of three phase reversible converter is becoming the researching hotpot on international and native.

由于中大功率的电力电子设备在电网中占很大的比重，因此高功率因数的三相可逆变流器的研究已成为当今国内外研究的一大热点。

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Conclusions (1) Children can develop reversible CAN after the exposure to high or low osmolality contrast medium.

结论（1）肾功能正常的儿童应用高渗或低渗造影剂均可发生可逆的造影剂肾病；

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The Te-O thin film as a reversible optical recording medium is a very promising material.

碲氧薄膜是很有希望的可擦写光盘介质材料。

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