详细解释:n. 河流正中, 中流
英语解释：
名词 midstream:
the middle of a stream例句：
Although many of the board members saw that the president was ill equipped to handle the company's recession-related difficulties, they felt it best not to change horses in midstream.虽然许多董事们认识到现在的董事长没有能力克服公司由于不景气而带来的种种困难，但是他们觉得最好不要中途换人。