ACEEn.访问环境元素acen.幺点；好手；高手；发球得分adj.一流的；卓越的vt.发球得分；考试中取得好成绩acetal polymer缩醛聚合物acetylcytosine乙酰胞嘧啶acelia acoelia无体腔acetyl acetone乙酰丙酮acetyl nitrate硝酸乙酸酐acetyl borneol乙酰龙脑acetyl eugenol丁子香酚乙酸酯acetylcysteine乙酰半胱氨酸acetylene bond炔键acetonaphthonen.萘乙酮