"水溶性阿拉伯胶" can be translated as "water-soluble gum arabic".
Here, "水溶性" (shuǐ róng xìng) is translated as "water-soluble," and "阿拉伯胶" (ā lā bó jiāo) is translated as "gum arabic," which is a well-known term in the food, pharmaceutical, and other industries.