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

最开始的引擎是射，目前已淘汰；然后是螺旋桨引擎，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.

最开始的引擎喷射式，目前已淘汰；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.

最开始的引擎是射式，目前已淘；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.

最开始的引擎是涡喷射式，目前已淘汰；然后是涡螺旋桨式引擎，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.

最开始的是轮喷射式，目前已淘汰；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.

最开始的擎是涡轮式，目前已淘汰；然后是涡轮螺旋桨式擎，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。