be of vital importance

基本解释

Simple keyboard shortcuts and mouseless operation will be of vital importance.
它应该具有简单的键盘快捷键并能脱离鼠标操作。
blog.cfan.com.cn
It goes without saying that a peaceful and stable environment, among other things, proves to be of vital importance for China.
不言而喻，除其他因素之外，一个和平稳定的环境对中国至关重要。
Although relations between China and the United States may be of vital importance to both, from the Chinese perspective, the relationship has been extremely brief.
尽管中美关系也许对双方来说都至关重要，但从中国人的角度来看，这种关系极其短暂。

This general observation is particularly true of the aerospace plane, whose technologies will be of such vital importance to U.S. security and commercial interests for generations to come.
CENTERFORSECURITYPOLICY: The National Aerospace Plane
The Obama administration's progress in wrecking our military would be bad enough under circumstances in which its defensive capabilities were not of vital importance to our nation's security.
CENTERFORSECURITYPOLICY: Destroying The U.S. Military From Within
It took the election of Ronald Reagan - who understood the vital importance of communicating America's message to the world - for this situation to be remedied.
CENTERFORSECURITYPOLICY: Public Diplomacy