Such a mistake would perhaps lead to disastrous consequences.

这样一种错误可能导致灾难性的后果。

youdao

Cass Frederick realized immediately that he had made a disastrous, maybe fatal, mistake.

卡斯'弗里德里克立即意识到，他犯了一个灾难性的、也许是致命的错误。

youdao

Different from making a mistake in China, when you are abroad, a slight mistake can cause a disastrous situation, because you don't have as much as you have in China to compensate this mistake.

与在国内犯错的情况不同，在国外，一个很小的错误就可能造成无法收拾的局面，因为你不像在国内那样拥有很多可以对错误进行弥补的资源。

youdao

Positions for and against unification that it was the inevitable destiny of the Italian people, or a disastrous mistake are a staple of Italian conversation, and, however cogently Graziano writes, one sometimes feels that he is loading the dice.

NEWYORKER: Booted

This was a mistake, perhaps a disastrous one.

CNN: 'Enhanced interrogations' don't work, ex-FBI agent tells panel

While the prime minister arguably made an unnecessary and potentially disastrous mistake in announcing his support for a demilitarized Palestinian state, by and large, he has successfully marginalized the Left.

CENTERFORSECURITYPOLICY: The lonely Israeli Left