an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet
双语例句
This product also contains rich essential amino acids and antioxidant. 此产品还含有丰富的必需氨基酸和抗氧化剂。
It is apparent from inspection of the table that poultry meat and eggs are relatively high in many of the essential amino acids. 如表所示，显然在禽肉和蛋类里许多必需氨基酸含量相对较高。
Is the amino acid in honey acidity? 蜂蜜中的氨基酸是酸性的吗？
Raspberry includes mang kinds of amino acid and microelement. 含多种微量元素及人体所需的氨基酸。
