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.

最开始的引擎喷射式，目前已淘汰；然后螺旋桨式引擎，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.

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，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.

最开始的引擎是喷射，目前已淘汰；然后是螺旋桨引擎，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射式，目前已淘汰；然后是涡轮螺旋桨式引擎，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.

最开始的引擎是，前已淘汰；然后是螺旋桨引擎，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.

最开始的是涡轮喷射式，目汰；然后是涡轮螺旋桨式，现在仍可在小飞机上看到。