1·The wall of vas deferens has no muscles.
输精管管壁有一层上皮细胞,但无肌细胞;
2·Researchers in China are also having success with a new vas deferens device, though theirs is not being billed as reversible.
中国的研究人员也正在成功研制一种新的输精管装置,目前还没有可逆性的有关报道。