?矿物药或颜料

... 物体随风在空中飘游浮荡 [hover or flutter in the air] 矿物药或颜料,研成细末,置于水中以漂去其浮于水面的粗屑 [skim off] 疾速 [swiftly] ...

?把…撇去

... skim away 把…撇去,掠过,轻轻滑开 skim off 把…撇去,提取精华 skim across 掠〔滑〕过 ...

?从液面上轻轻地舀

... ◎ [lay aside;neglect;abandon] 同本义 ◎ [skim off] 从液面上轻轻地舀,以去掉泡沫或浮渣 ◎ [glance at;take a quick look at] 同“瞥”。眼光掠过;匆匆一看 ...