Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recycles quickly, very small amounts of catalyst often suffice;
mixing, surface area, and temperature are important factors in reaction rate.
Catalysts generally react with one or more reactants to form
intermediates that subsequently give the final reaction product, in the process regenerating the catalyst.
促成變化，我先前是說，需要槓桿點 (fulcrum)，
觸媒，這兩字我可以接受，
但是，參與了化學變化，又源源不絕，不多不少，不缺不損，再循環生成，
居然，全身而退，毫髮無傷，這我無法接受，
意思是說，治療者，不應如此安全，他理應送命，
你要理解，上述關於觸媒的理想命運，的前提是，那是平衡的，健康的化學方程式，觸媒只是加強加速之，但是病人是失衡的化學方程式，觸媒的命運是不確定的，甚至在此，觸媒最重要的作用，應是減速，而非加速，
