gān / àn / suān / shì / rén / tǐ / hé / chéng / dàn / bái / zhì / suǒ / xū / de / yī / zhǒng / ān / jī / suān甘胺酸是人体合成蛋白质所需的一种氨基酸。Glycine is an amino acid needed by the human body to synthesize proteins.