not perforated, in particular 无孔的,尤指 ■(Anatomy & Zoology)lacking the normal opening (剖,动)无孔的,闭锁的 unicellular spores of these parasites have an imperforate wall. 这些寄生虫的单细胞孢子有一层无孔壁。 ■(of a postage stamp or a block or sheet of stamps) lacking perforations, especially as an error (邮票)无齿孔的