关于四代机的标准，也是这些军火商想出来的。军方常年向这些公司寻求概念。

 In June 1981 a request for information (RFI) for the Advanced Tactical Fighter (ATF) was published by the Air Force. Design concepts were provided by defense contractors. The common areas among the concepts were Stealth, STOL and supercruise.

所有跟帖： 

• Design concepts were provided by defense contractors. -maniac62- ♀ (0 bytes) () 09/03/2018 postreply 00:05:02

• 好吧，翻译不妥。您给一个正确的吧。 -SDUSA- ♀ (0 bytes) () 09/03/2018 postreply 00:08:02

• 您这一句有出处吗？ -SDUSA- ♀ (0 bytes) () 09/03/2018 postreply 00:12:58