幻想未来
本文主要介绍了变频器在国产单双色单张纸平版印刷机改造中的应用，以及对变频器的一些功能的要求。
The paper introduces the application of inverter in the reform of homemade single - double-color singleton paper lithography machine, followed with some functional demands for inverter.
利用ZINDO/SOS方法，从理论上研究了对称和不对称取代两种情况下，取代基对二噻吩并噻吩衍生物单双光子吸收性质的影响。
In order to investigate the effect of substituents on the two-photon absorption properties(TPA), the one-and two-photon absorption properties were theoretically studied by using ZINDO/SOS method.
再也没有比一双格纹鞋更别致的单品了。
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