1. They are now trying to chase down all possible clues.
    他们现在正在设法寻找一切可能的线索。

1. chase down的反义词

1. 找出：chase after 追赶 | chase down 找出 | chase up 追上

1. 追到;抓到
    If you chase someone down, you run after them or follow them quickly and catch them.

    e.g. Ness chased the thief down and held him until police arrived...
           内斯追上小偷，按住他，一直等到警察赶到。
    e.g. For thousands of years chasing down game was the main activity in which humans were involved.
           狩猎是数千年中人类从事的主要活动。

2. (搜寻后)找到，找出
    If you chase someone or something down, you manage to find them after searching for them.

    e.g. That''s when I chased her down to be the singer in my band...
           就是那时候，我找到了她，让她在我的乐队里担任歌手。
    e.g. Bank officials argued that it is not their job to chase down every asset of every bank debtor.
           银行官员称，他们没有义务追踪每个贷款户的每笔资产。