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activity decline中文是什么意思

发音:  
用"activity decline"造句"activity decline"怎么读"activity decline" in a sentence

中文翻译手机手机版

  • 活性下降

例句与用法

  • Businesses too had to face enormous challenges as deflation deepened , consumer spending shrank and business activities declined
    工商界面对的挑战也不少,例如通缩恶化、消费开支萎缩、生意低迷。
  • Businesses too had to face enormous challenges as deflation deepened , consumer spending shrank and business activities declined
    工商界面对的挑战也不少,例如通缩恶化、消费开支萎缩、生意低迷。
  • The initial activity of pt / tio2 was higher than that of tio2 because it restrained the recombination of electron and hole with supported pt , however the regenerated ability of the pt / tio2 was lower than that of tio2 . after the regeneration , the activity could come back to some 60 % of the original activity and the reaction activity declined rapidly . the reason might be that after regeneration on the surface of pt / tio2 the incomplete oxidation of h2s to produce s was enhanced
    Pt tio _ 2催化剂的初活性比单一的tio _ 2催化剂的初活性高,这是因为担载的贵金属抑制了电子与空穴的复合,但其再生性能比tio _ 2差,再生后活性只能恢复到初活性的约60 ,且反应活性迅速降低,这可能由于在再生后的pt tio _ 2表面上, h _ 2s通过不完全氧化生成s ~ 0的反应增强所致。
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