roach/rəutʃ; rotʃ/ n(pl unchanged 复数不变) small freshwater fish of the carp family 拟鲤（一种鲤科淡水小鱼）.roach / rəutʃ; rotʃ/ n (pl ~es) (esp US)1 (infml 口) = cock-roach.2 (sl 俚) stub of a marijuana cigarette 大麻卷烟的烟蒂.
牛津英汉双解词典