求翻译：温度的控制对酒精发酵的进行也是一个关键。酒精发酵的主要目的在于释放能量以供酵母菌新陈代谢所需。然而，多余的能量则会以热能的形式释放出，使发酵槽内的温度升高。由于酿酒酵母菌的生长适温约在4是什么意思？

Temperature control is a key to the alcoholic fermentation. Main purpose of the alcoholic fermentation is required to release energy for metabolism of yeast. However, excess energy is in the form of heat energy release, increased temperature in the digester. Due to the growth of Saccharomyces cerevisiae strains suitable Wen Yue in 4-30 ℃, in this temperature range, the higher the temperature, higher the rate of metabolism of yeast grow faster, but higher than 30 ° c of temperature will kill the yeast. (Free circulation cooling water flow or a new fermentation tank to control the temperature)