常见例句In female flowers,Ovule is anatropous,unitegmic and tenuinuceuate with the development of integument finished at the stage of archespore. 在雌花中，胚珠是倒生的，单珠被，薄珠心，珠被于孢原期已发育完整。archesporium(archespore) 原孢子 返回 archespore