但超音速客機自問世以來一直備受成本效益、環境破壞等因素困擾，並未有大規

但超音速客機自問世以來一直備受成本效益、環境破壞等因素困擾，並未有大規模推廣使用。

結果 (英文) 1:

But since the advent of the supersonic jet has been cost-effective, environmental damage and other factors, there is no large scale use.

結果 (英文) 2:

But since the advent of supersonic aircraft has been highly cost-effective, environmental damage and other factors problems, did not promote the use of large-scale.

結果 (英文) 3:

However, since the advent of the supersonic aircraft has been much cost effectiveness, environmental damage and other factors, there is no large-scale promotion of the use of.