The origins of the famous Boeing 747 hump  come from its role as a cargo aircraft.

著名的波音 747 驼峰起源于其作为货运飞机的角色。

However, to make it even more  confusing for all of you watching, retired passenger Boeing 747-400s  were retrofitted into cargo aircraft and created a stretched humped 747-400  Boeing Converted Freighter (BCF).

然而，为了让所有观看者更加困惑，退役的波音 747-400 客机被改装成货机，并创造了一个加长的驼峰 747-400 波音改装货机 (BCF)。

Since those early 747 days, cargo aircraft have become more ubiquitous, with freighter  variants ranging from the small 737 all the way up to the 747-8 and, of course, the  mighty Antonov An225.

自 747 早期以来，货机变得更加普遍，货机型号从小型 737 一直到 747-8，当然还有强大的 Antonov An225。