ferment

1. N-UNCOUNT Ferment is excitement and trouble caused by change or uncertainty. 骚动

The whole country has been in a state of political ferment for some months. 整个国家几个月来一直处在政治骚动的状态中。

2. V-T/V-I If a food, drink, or other natural substance ferments, or if it is fermented, a chemical change takes place in it so that alcohol is produced. This process forms part of the production of alcoholic drinks such as wine and beer. 使发酵; 发酵

The dried grapes are allowed to ferment until there is no sugar left and the wine is dry. 干葡萄要经过发酵，直到没有糖分存留，葡萄酒才不会有甜味。

3. fermentationN-UNCOUNT 发酵

Yeast is essential for the fermentation that produces alcohol. 酵母对酿酒的发酵是必要的。