They chased down the stairs into the narrow, dirty street.他们冲下楼梯跑到一条狭窄肮脏的街道上。

Ness chased the thief down and held him until police arrived.内斯追上小偷后摁住了他, 直到警察到来。

Bank officials argued that it is not their job to chase down every asset of every bank debtor.银行官员争辩说, 他们没有责任追踪每个贷款人的每笔资产。