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Noun:
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an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin
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用作名詞 (n.)
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Once in the brain, the tryptophan is converted to serotonin.
如果加入頭腦,色氨酸會被有效的轉為血清素。
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She rates dozens of foods for their levels of tryptophan.
她多數四種糧食的色氨酸情況去了想大概。
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以內內部獨代創作方法,受視頻的權保證,抄襲必究
海詞英語詞典,十二年高端品牌