Introduce the general idea: human body need all kinds of nourishment during the life(such as water, inorganic acid, protein, glycolipin, microbian mineral, oxygen),blood cycle for digestion.
人体在命运动中需要各种营养(水、无机盐、蛋白质、糖类脂、物矿物质,氧气),消化吸收需通循环系统。
Introduce the general idea: human body need all kinds of nourishment during the life(such as water, inorganic acid, protein, glycolipin, microbian mineral, oxygen),blood cycle for digestion.
人体在命运动中需要各种营养(水、无机盐、蛋白质、糖类脂、物矿物质,氧气),消化吸收需通循环系统。
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