The first catalytic converters were called conventional oxidation catalysts.最初的转化器叫做常规氧化催化器.Many processes that are essential to the chemical industry use heterogeneous catalysts.很多重要的化学工业过程就是使用多相催化剂的.The producing techn...
The first catalytic converters were called conventional oxidation catalysts.最初的转化器叫做常规氧化催化器.Many processes that are essential to the chemical industry use heterogeneous catalysts.很多重要的化学工业过程就是使用多相催化剂的.Catalysts that lowe...
Among the most spectacular sights are the great sea-bird colonies.庞大的海鸟群是最壮观的景象之一。The colonies were claiming a larger measure of self-government.殖民地正要求获得更大程度上的自治。The colonies received only a passing mention.那些殖民地只是顺带提了一下...
进入睡眠状态时，我们的脑电波振幅慢慢变大。As we fall asleep the amplitude of brain waves slowly becomes greater.由于驱动机构的作用,使驱动端的振幅保持不变.The amplitude at the driven end is fixed by the driving mechanism.这样,即使是最强声音的位移振幅,也还是非常小的.Thus the displace...