British Aerospace reckon that the plane will be commercially viable if 400 can be sold.

英国航空航天公司估计这个型号的飞机如果能卖出400架，就可实现盈利。

柯林斯例句

Engineers are still trying to come up with a commercially viable replacement for internal - combustion engines.

工程师在设法制造一种在商业上切实可行的发动机来取代内燃机.

《简明英汉词典》