additive complementary colour

例句：

1. 1.The addition of salt to the soup makesit taste better.
   在汤中加入盐会使它的味道更好。
2. 2. The company added anew product line to its portfolio last quarter.
   该公司上个季度增加了一个新的产品线。
3. 3. Theadditives in the paint are meant toprotect the surface from scratches.
   油漆中的添加剂旨在保护表面免受刮擦。