When the concentration droped to 4%, an irreversible change in the myocardium ultrastructure was obviously observed.

当吸入氧浓度为4%时，心肌超微结构出现明显地不可逆性改变。

youdao

“We cannot yet be sure that there is an irreversible change in the trend, ” he told a parliamentary debate on joblessness on November18th.

“我们尚不能确定不可逆变化会存在于这种趋势中，”他说在11月18日这天，国会还就失业问题进行了辩论。

youdao

The report reflects climate scientists' growing fears that Earth is nearing the stage when carbon dioxide rises will bring irreversible change to the planet.

报告反映出气候科学家们对地球正在面临的境况感到日益忧虑，二氧化碳的提升将对这个星期造成不可逆转的改变。

youdao

"That means protecting the rights of Egypt's citizens, lifting the emergency law, revising the constitution and other laws to make this change irreversible and laying out a clear path to elections that are fair and free.

VOA: special.2011.02.12

And for the spontaneous change which happens irreversibly That means that'll be dq irreversible.

对于不可逆的自发过程,这说明dq是不可逆的,当过程是可逆时。

麻省理工公开课 - 热力学与动力学课程节选

It is that in order to "change course and steer away from critical tipping points... that might lead to rapid and irreversible change", something radical is needed.

BBC: Gear change on road to Rio?

They go further and point to, just as one example of their argument, the way in which population rise could lead to a phase change, a chaotic and of unknown outcome, rapid and irreversible change in our environment.

FORBES: Nature on Uncertainty: Climate Change is Less Important Than We Thought

Scientists and economists have said this plan risks leading to catastrophic and irreversible climate change.

FORBES: Climate Treaty Would Actually Be Good for Business