be on the case
US /bi ɑn ðə keɪs/
UK /bi ɑn ðə keɪs/
成语
1.
正在处理, 正在调查
to be investigating or dealing with a problem or situation
示例:
•
Don't worry about the missing documents, I'm on the case.
别担心丢失的文件，我正在处理。
•
The detective assured them he would be on the case immediately.
侦探向他们保证他会立即着手调查。
在 Lingoland 学习这个单词