B2 正相反，恰恰相反
used to show that you think or feel the opposite of what has just been stated
"I thought you said the film was exciting?" "On the contrary, I nearly fell asleep half way through it!" “你不觉得这部电影很精彩吗？”“正相反，看到一半我差点睡着！”
I'm not angry with you. On the contrary!
They do not reject modernity completely; on the contrary, they embrace the modern world.
"Did you expect them to help you?" "On the contrary, I hoped they would stay away."
I did not mean to imply that the city was an ugly or dangerous place. On the contrary, I think it is extremely pleasant.
See also: contrary noun