十万火急的英文：
[Literal Meaning]
a hundred thousand/fire/urgent
to be most urgent

[解释]
形容情况非常紧急。

[Explanation]
to be most urgent

[例子]
都到了十万火急的时候了，你怎么还这样慢吞吞的。

[Example]
How can you still be so poky at the most urgent moment?

Extremely urgent
十万火急

I was frantic to finish the report on schedule.
我十万火急地要按预定时间完成报告。