the level of glucose (= a type of sugar) in the blood. If this level is too low or too high, it can make you ill.

Exercise helps lower blood sugar levels and reduce the risk of diabetes. 锻炼有助于降低血糖并减小得糖尿病的几率。

The milk and cookie helped boost her blood sugar. 牛奶跟曲奇饼帮助她血糖升高。