grave responsibility

例句：

1. 1. The grave situation requires immediate action.
   严峻的情况需要立即采取行动。
2. 2. He was gravely injured in the accident.
   他在事故中严重受伤。
3. 3. The decision is of grave importance to the future of the company.
   这个决定对公司的未来至关重要。