南京是江蘇省的省會城市，被認為是一個受歡迎的旅游目的地。然而，它也是一個擁擠的城市，交通繁忙，嚴重的空氣污染等.A說他想留在這樣的城市，而B顯示不同的意見。

A:Do you think Nanjing is livable city?

B:Of course not!

A:Why do you think so?Nanjing is a flourishing city,it’s economical environment and cultural circumstance is great.

B:It’s air condition is terrible.

A:It’s a safe city,you don’t need to worry about being killed by a gun.

B:It’s air condition is terrible.

A:Nanjing is six-dynasties ancient Capital.It has rich cultural deposits

B:It’s air condition is terrible.

A:Can we not talk about air condition?Why do you concentrate on this?

B:Because air in the country of USA is sweet.

A:I don’t remember the protein coat of COVID is sweet.

B:(think for a while)Maybe you are right.

A:Do you think Nanjing is livable city?

B:Of course!