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different opinion; different view; dissenting view; objection
異見を述べることを恐れてはいけない。
You shouldn't be afraid to express different opinions.
彼の異見には確かに一理あると思った。
I thought his different opinion certainly had some merit.
会議で異見を堂々と述べる勇気が必要だ。
It takes courage to openly express different opinions at meetings.