ChinaAbstract: beer foam is an important index for beer quality.

摘要：啤酒泡沫是啤酒质量的一项重要指标。

youdao

ChinaAbstract: beer foam is an important index for beer quality.

摘要：啤酒泡沫是啤酒质量的一项重要指标。

youdao