1. (交通)阻塞
A tie-up or a traffic tie-up is a long line of vehicles that cannot move forward because there is too much traffic, or because the road is blocked by something.

e.g. In some cities this morning, there were traffic tie-ups up to 40 miles long.
今天早上，在有些城市汽车排起了长达 40 英里的长龙。

noun

1. an interruption of normal activity

Synonym: standstandstill

2. a social or business relationship

e.g. a valuable financial affiliation
he was sorry he had to sever his ties with other members of the team
many close associations with England

Synonym: affiliationassociationtie