noun 下载 🔗分享 色氨酸 An essential amino acid having an indole side chain; it is present in many foods, especially chocolate, oats, bananas and milk; it is essential for normal growth and development and is the precursor of serotonin and niacin; any specific form of this compound, or any derivative of it. Examples : "Eating a banana before bed can help you relax because bananas contain tryptophan, which the body uses to produce calming hormones. " 睡前吃根香蕉能帮助你放松,因为香蕉里含有色氨酸,身体会利用色氨酸来生成让人平静的激素。 compound medicine substance food physiology biochemistry biology chemistry science body 与AI对话词汇游戏阅读练习