这种止咳糖浆含有甘油，使口感更甜更容易服用。

The cough syrup contains ___glycerol to make it sweeter and easier to take.

甘油是植物油中常见的成分之一。

___Glycerol is a common component found in vegetable oils.

这种蛋糕含有甘油，可以保持湿润口感。

This cake contains ___glycerol to maintain its moist texture.