During the process of beer brewing, the content of diplo-acetyl is a key factor to restrain the ripe time, and the main purpose of ripe time is to lower the content of diplo-acetyl down to the valve.

• 在啤酒酿造中，双乙酰含量的多少是熟化期长短的主要限制因素，把双乙酰含量降到阀值以下是熟化期的主要目的。