画家在颜料中加入少量阿拉伯胶，使水彩干燥后仍能牢固附着在纸面上。
The painter added a small amount of gum arabic to the pigment so that the watercolor would remain firmly attached to the paper after drying.
The painter added a small amount of gum arabic to the pigment so that the watercolor would remain firmly attached to the paper after drying.