n.着色，着色法（colouring的复数形式）...

Our range of herbal teas contain no preservatives, colourings or artificial flavourings.我们这一系列的药草茶不含防腐剂、色素以及人工调味品。Glass bottles are filled with water tinted with food colourings.玻璃瓶中盛满了被食用色素染过色的水。...

colourings的音标：...