"Diacetyl content" is the Engpsh term for the concentration of diacetyl in a substance.

Diacetyl is a natural byproduct of fermentation and is found in trace amounts in various foods and beverages, including beer, wine, and butter. It is also used as a flavor and aroma enhancer in some processed foods.

Some examples of sentences using the term "diacetyl content" in Engpsh, with their translations in Chinese:

"The diacetyl content in this batch of beer is within acceptable levels." (这批啤酒的二甘醇含量在可接受的范围内。)
"The diacetyl content of this butter is higher than usual due to the type of cow's milk used." (由于使用的牛奶类型不同,这种黄油的二甘醇含量比平常高。)
"The diacetyl content of this wine is lower than that of other wines because it was aged for a shorter period of time." (这种葡萄酒的二甘醇含量比其他葡萄酒低,因为它陈年时间较短。)