translation.en: Enzymes, those workhorses of life, the catalysts of chemical reactions -- enzymes are biomolecules that speed up chemical reactions in living cells, by many, many orders of magnitude.
translation.zh: 酶，为维持生命努力运作着，是化学反应的催化剂—— 酶这种生物分子加快了活细胞中的化学反应， 规模大小不一。