不过，这些天然的空气净化剂只是在黑暗中起作用。
These natural air purifiers only work in the dark , though .
氢氧化锂在特殊环境中用作空气净化剂，吸收人体呼吸排出的二氧化碳。
Lithium hydroxide is used as purificant in special environment to adsorb CO2 breathed out by person .
空气净化剂空气净化剂空气净化剂