react against =to show dislike or opposition in response to sth, e. g. He reacted strongly against the artistic conventions of his time. برعکس عمل کردن
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از شخص، قوانین و غیره اطاعت نکنید زیرا مخالف هستید
To show dislike or opposition in response to something, especially by deliberately doing the opposite of what somebody wants you to do.
Many young people react against traditional values.
He reacted strongly against the artistic conventions of his time.
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