moistening agent的用法和樣例：
例句
- It is used as a solvent, wetting and dispersing agent.
它可用作溶劑，濕潤劑及分配劑。 - Prewetting of coal seams by water infusion is an essential measure for dust control at working faces.Adding of wetting agent is an important approach for improving water infusion.
煤層注水預濕是采煤工作面防塵的治本措施，添加濕潤劑是改善煤層注水效果的重要途徑。
