形容词

1. 至关重要的;关键性的
If you describe something as crucial, you mean it is extremely important.

1. of extreme importance
vital to the resolution of a crisis

e.g. a crucial moment in his career
a crucial election
a crucial issue for women

Synonym: important

2. of the greatest importance

e.g. the all-important subject of disarmament
crucial information
in chess cool nerves are of the essence

Synonym: all-important(a)all important(p)essentialof the essence(p)

3. having crucial relevance

e.g. crucial to the case
relevant testimony