永久性细胞已脱离细胞周期，注定要衰老和死亡。
Permanent cells have left the cell cycle and are destined to senesce and die.
奥尔文教授说，“我们发现，移植的干细胞发生了永久性改变，减缓了接受移植肌肉的老化，保持了其力量和质量。”
"We found that the transplanted stem cells are permanently altered and reduce the ageing of the transplanted muscle, maintaining strength and mass," said Prof Olwin.
当前的方法使用病毒或者化学物质向细胞中引入外来dna，但是这些操作将带来永久性的改变，会引起其特有的并发症。
Current methods use viruses or chemicals to bring foreign DNA inside cells, but these make permanent changes, which could have their own complications.
细胞、酶、光合作用—人类很快就会按照自己的意志创造新的生命。更不用说制造备用身体零件和永久性驯服流感。
Cells, enzymes, photosynthesis - soon we'll be remaking life our own way. Not to mention making our own spare body part, and taming flu once and for all.
目前为止，科学家普遍认为癌细胞必须永久性的由静止性的上皮细胞转变成迁移性的间充质细胞后才能够转移。
Until now, scientists have believed that cancer cells must transform permanently from stationary epithelial cells into migratory mesenchymal cells in order to metastasize.
酵母细胞的液泡是永久性的细胞器。
The vacuoles of yeast cells represents persistent organelles .
这些研究者们说，还不知道是否可以利用这种技术来延长为生长足够多的细胞用于永久性移植所需要的时限，因此需要进一步研究去看它是否这样。
Whether this technology can be used to extend the period needed to grow enough cells for a permanent graft is not known and future research is needed to see if it is, the researchers say.
内耳毛细胞受损后的不能再生或修复与永久性听力丧失相关。
Damaged hair cells in the inner ear are associated with permanent hearing loss, as hair cells cannot regenerate or be replaced.
酵母细胞的液泡是永久性的细胞器。
Thevacuoles of yeast cells represents persistent organelles.
当致癌物作用于细胞时，它们可能会引起细胞永久性改变，这种改变使人易患癌症，这就是我们所说的肿瘤起始过程。
When carcinogens act on a cell, they may cause a permanent change which predisposes to cancer - a process known as tumour initiation.
当致癌物作用于细胞时，它们可能会引起细胞永久性改变，这种改变使人易患癌症，这就是我们所说的肿瘤起始过程。
When carcinogens act on a cell, they may cause a permanent change which predisposes to cancer - a process known as tumour initiation.
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