B2 necessary for the success or continued existence of something; extremely important必不可少的;极其重要的
More examples
It was said that the police concealed vital evidence.
The exploration for new sources of energy is vital for the future of our planet.
Mr Clinton singled out education as a vital tool in bridging the gap between rich and poor.
These monuments are a vital part of the cultural heritage of South America.
Trust is a vital ingredient in a successful marriage.
formal approving energetic生机勃勃的;充满生气的
formal relating to life生命的
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