having or relating to a single pole or kind of polarity 单极的 a unipolar magnetic charge. 单极磁荷。 ■(of psychiatric illness) characterized by either depressive or (more rarely) manic episodes but not both (精神病)单极性的 ■(of a nerve cell) having only one axon or process (神经细胞)单极的 ■(Electronics)(of a transistor or other device) using charge carriers of a single polarity (电子)(晶体管等)单极的