tetrads四色相(等间隔)配色tetran.脂鲤（南美产的热带鱼）pref.四；四原；四基tetracosandioic acid二十四烷二酸tetradynamous stamen[医] 四强雄蕊Tetrameres americana美洲四棱线虫tetraethyl radiolead四乙基放射铅tetraphenyl pyrazine四苯基吡嗪Tetragnathacaudiculan.尖尾肖蛸tetramethyl thiourea四甲基硫脲tetranitroerythritol四硝基赤藓醇Tetramitus descissusn.四丝藻tetracyclic compound四环化合物