Hello, I have an emergency.

你好，我这里出现紧急情况。

youdao

I have an emergency brake.

我急刹车了。

youdao

I have an emergency.

我有个紧急情况！

youdao

If I have an allergic reaction, do I need to use emergency medication such as an epinephrine autoinjector (EpiPen, Twinject)?

CNN: Bee stings

And I agree that, in an emergency, it is very helpful to have most flexibility as you can to immediately respond.

NPR: Global Humanitarian Group Rejects U.S. Aid - Part II

So doing more of this on an emergency basis with the extreme unemployment levels that we have I think will help our economy and better position it to compete in the world market a decade or two ahead.

WHITEHOUSE: President Obama Meets with Economic Recovery Advisory Board | The White House