in midstreamwhen something has started and is still happening 在进行中,在中途 They had to drop the experiment in midstream. 他们不得不中途放弃实验。
He interrupted the official in midstream (=while the official was still speaking). 他中途打断了官员的话。
in midstream• The employees found it difficult to adjust to changes in midstream.
→ in midstream at midstream(1)