Soy lecithin bonds with the water and helps the powder disperse more quickly.
大豆卵磷脂与水结合,有助于粉末更快地分散。
英语百科
Lecithin
Lecithin is a generic term to designate any group of yellow-brownish fatty substances occurring in animal and plant tissues, which are amphiphilic - they attract both water (and so are hydrophilic) and fatty substances (lipophilic), and are used for smoothing food textures, dissolving powders (emulsifiers), homogenizing liquid mixtures, and repelling sticking materials.