Nor do UAS have to be rotated in and out of a war zone like manned aircraft.

因为在提供支援时，“无人飞行系统”通常是远离冲突区域的，它们绝不会像有人飞行器那样在战场上飞进飞出。

youdao

Along with persistence, UAS have other potential advantages over manned aircraft.

相比于有人飞行器，“无人飞行系统”还拥有除了毅力以外的其他优势。

youdao

Moreover, drone engines are smaller-and therefore cooler-than those powering heavier, manned aircraft.

此外，无人机的发动机比要驱动沉重的有人驾驶飞机的发动机体积小，因而发热更低。

youdao

Manned aircraft may be replaced in part by unmanned aerial vehicles and satellites, he predicts.

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The military originally had envisioned a drone that could stay in the skies hours longer than a manned aircraft.

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Consequently, its options for contending with rapidly escalating long-range threats from places like Iran are limited to manned aircraft and its suspected nuclear arsenal.

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