food sources短语⁸⁴³²⁰⁺⁸ 基本例句 食品来源 Zinc is another important mineral that these food sources provide—it serves many functions, one of which includes activating a white blood cell that helps fight off infections. 这些食物里也都含有另外一种重要的矿物质-锌。锌在人体内参与多项重要生理功能，如激活白细胞帮助抵抗感染等。 kekenet