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middle stage; middle phase; middle game; midpoint
midfield (in soccer)
試合は中盤から接戦になった。
The game became close from the middle stages.
物語の中盤で意外な展開があった。
There was an unexpected development in the middle of the story.
映画は中盤以降に急速に面白くなっていく。
The film picks up quickly after the midpoint.