Within their study, the researchers used spermatogonial stem cells (those stem cells that constantly produce sperm in all mammals) and exposed them to cigarette smoke for six or 12 weeks.

• 在他们的研究中，研究人员应用精原干细胞（哺乳动物持续产生精子的干细胞），将其暴露于烟草中6周或12周。