名詞 midstream:

1. the middle of a stream

1. 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.
   雖然許多董事們認(rèn)識到現(xiàn)在的董事長沒有能力克服公司由于不景氣而帶來的種種困難，但是他們覺得最好不要中途換人。
2. It is very serious and important, Why do you change horses in midstream.
   這是十分嚴(yán)肅而又重要的事。你為什么中途改變計劃了？

mid.stream

n.（名詞）
The middle part of a stream.
中流：溪流中間的部分
The part of a course that is neither at the beginning nor at the end:
中途，半途：既不在開頭也不在結(jié)尾的一個過程中的一部分：
例句：
the midstream of life.
中年階段