Leaves used for black tea ferment for days before they're heated, causing the leaves to blacken and many chemical changes to happen within them.
而制作红茶的叶子会在被加热之前先进城数日的发酵，导致这些叶子变成黑色，并且在其中发成多种化学反应。
Biodegradable polyesters are polymer materials, they can be synthesized by chemical methods, enzymatic-catalysis and ferment.
生物可降解聚酯是一种新型高分子聚合材料，可通过发酵、化学方法和酶催化来合成。
L-glutamic acid is a kind of important chemical compound, which is mainly produced by ferment method from maize, wheat, sweet potato, rice, sugar molasses, beet molasses.
谷氨酸是一重要的化合物，主要用发酵法生产，玉米、小麦、甘薯、大米、甘蔗糖蜜、甜菜糖蜜等是发酵生产谷氨酸的淀粉质主要原料。
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