Formerly , surface painting or admixing with water - repellent admixture had low efficiency and relatively high cost.以往, 表面涂覆或掺加憎水剂,效果不大而且昂贵....

admixing的音标：admixing的英式发音音标为：[æd'mɪksɪŋ]admixing的美式发音音标为：[æd'mɪksɪŋ]...

v.使混合，混合( admix的现在分词 )...