a water-soluble plant exudate composed of polysaccharides, frequently used as a stabilizer or thickening agent in food and industry

阿拉伯树胶是食品工业中常用的乳化剂。

noun · a sticky, viscous substance secreted by certain trees that often hardens upon exposure to air, used in varnishes and adhesives

昆虫被困在粘稠的树胶中，经过千万年变成了琥珀。