English主要词典
hub
Universal Words
noun
1 [usuallysing.] ~ (of sth) the central and most important part of a particular place or activity:
the commercial hub of the city * The kitchen was the hub of family life. * to be at the hub of things (= where things happen and important decisions are made) * a hub airport (= a large important one where people often change from one plane to another)
2 the central part of a wheel