irreplaceable

音标发音

If Darwin were not so irreplaceable as Lincoln, that should not gainsay his accomplishment.
即使达尔文并不是象林肯那样不可替代，但这并不会否认他的成就。
So be careful with the precious things you have, and treat them like the precious things they are, even if others don't. Because some of them -- like Helium -- are truly irreplaceable.
所以请多多关注你所拥有的珍贵之物吧，要好好对待它们，即使别人不这么做，因为有些东西——例如氦——确确实实是无可替代的。
The proposed land sales are driven by the need to generate quick cash, but they must not be at the expense of protecting our natural capital, which is irreplaceable.
这个销售土地的计划是受想要挣快钱所驱使的，但它们绝对不值我们保护环境所花费的资金，而对环境的保护是不可替代的。

But,in his words, those who were killed on board the plane were all "irreplaceable".
And I would say their moral example was irreplaceable.
"I was just in Sri Lanka last week and in Indonesia about a month ago talking to people who had lost family members and the loss,the sorrow, the irreplaceable loved one is still felt.

Well, if--as with a real highway--it destroys something irreplaceable, a vital ecosystem essential to human life.
FORBES: Medialand

Irreplaceable things are so special that they cannot be replaced if they are lost or destroyed.