trace amounts英语标准发音：trace amounts英式发音：美式发音：翻译中文微量trace amounts - 基本释义[词典1]痕量微量极小量trace amounts - WEB词典trace amounts微量痕迹量玩具trace amounts of fluorine微量氟trace amounts of pb痕量铅 参考资料： 1.百度翻译：trace amounts2.有道词典：trace amounts3.爱词霸：trace amounts
