I make a grave decision.

我做了一个严肃的决定。

youdao

His face was grave when I told him my decision.

当我告诉他我的决定时，他的脸色很严肃。

youdao

I am convinced that, contrary to expectations, the so-called informed decision will bring very grave consequences.

我确信这项所谓明智的决定，与期望相反，会带来极其严重的后果。

youdao

And in the unique legal-political setting of an impeachment proceeding, it protects against partisan overreaching and it assures the public that a grave decision is being made with due care.

CNN: Transcript: White House Counsel Ruff's opening statement

This sense of dysfunction inside the Holy See - combined with considerations of failing health - pushed him to make what he has admitted was a "grave" decision to step down.

BBC: Decoding the Papacy: Benedict XVI's cryptic frustration

Libya had threatened to reveal more about the "grave secret" if France went ahead with its decision to recognise the rebel Transitional National Council as the legitimate representative of the Libyan people.

BBC: Gaddafi: 'Libya funded Sarkozy's French poll campaign'