First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡射式，目前已；后是涡螺旋桨式引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡轮式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的是轮喷射式，淘汰；然后是轮螺旋桨式，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的涡轮喷射式，目前已淘汰；然后涡轮螺旋桨式，现在仍可在小飞上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是喷射式，目前已淘汰；然后是螺旋桨式引擎，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引是喷射，已淘汰；然后是螺旋桨引，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的涡轮喷射式，目前已淘汰；然后涡轮螺旋桨式，现在仍可在小飞上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式，现在仍可在小飞机上看到。

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡，目前已淘汰；然后是涡螺旋桨引擎，现在仍可在小飞机上看到。