A yellowish-white,crystalline purine base,C5H4N4O2,that is a precursor of uric acid and is found in blood,urine,muscle tissue,and certain plants.是什么意思_A yellowish-white,crystalline purine base,C5H4N4O2,that is a precursor of uric acid and is found in blood,urine,muscle tissue,and certain plants.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句