Permanent cells have left the cell cycle and are destined to senesce and die.

永久性细胞已脱离细胞周期，注定要衰老和死亡。

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What we did in our ancestry was to produce more permanent natural coloring in our skin cells.

我们祖先所做的是在我们的皮肤细胞中产生更持久的天然色素。

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Even the simplest earplugs, she says, can lower noise exposure by 20 decibels and protect hearing cells from permanent damage.

亨德逊说，即使一个最简单的耳塞，都能够降低20分贝的噪音，保护我们的耳朵原理永久性的伤害。

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New techniques have been developed, however, to make induced pluripotent stem cells without permanent genetic modifications that were associated with tumors.

CNN: Cloning stem cells: What does it mean?