be on the case
US /bi ɑn ðə keɪs/
UK /bi ɑn ðə keɪs/
1.
正在處理, 正在調查
to be investigating or dealing with a problem or situation
:
•
Don't worry about the missing documents, I'm on the case.
別擔心丟失的文件，我正在處理。
•
The detective assured them he would be on the case immediately.
偵探向他們保證他會立即著手調查。