in midstream
1 in the middle of a stream or river.
2 (of an activity or process, especially one that is interrupted) part-way through its course; unfinished.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。