It was carried aloft by a converted Boeing 747 and used solely for glide-approach and landing tests.

它被一架改建的波音747型飞机抬到高处而且仅用于进场滑行和着陆试验。

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It was carried aloft by a converted Boeing 747 and used solely for glide-approach and landing tests.

它被一架改建的波音747型飞机抬到高处而且仅用于进场滑行和着陆试验。

youdao