pull off

释义：If you pull off something very difficult, you succeed in achieving it.

原句：Bernie Sanders pulled off his biggest win of the Democratic presidential race on Tuesday

例句：The National League for Democracy pulled off a landslide victory

hub

释义：You can describe a place as a hub of an activity when it is a very important centre for that activity.

原句：Fatal explosion hits transit hub in Turkish capital Ankara

例句：As a hub of finance and communications, Paris is now almost equal to London.