translation.en: Or they'll put male cells in a female body or vice versa, which sounds absolutely horrible until you realize, the reason you're doing that is you're substituting bone marrow during cancer treatments.
translation.zh: 或者他们会把男性细胞 和女性细胞放入对方体内， 听起来无比可怕。 其实你发现这就是 你在癌症治疗过程中 替换骨髓的过程。