If you've ever held a bicycle wheel while it's turning and tried to reorient it you know that the wheel itself pushes back, trying to remain in its original plane.

如果您曾经这么做过——平举着一个正在旋转的自行车车轮，然后试图将它向任意方向倾斜——您就会知道，这时车轮本身会将您的手往回拽，努力保持在它原来的旋转平面上。

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The back wheels of the plane touched the runway, but it became unstable when the front wheel touched down, he said.

他说，飞机后轮先着陆，但当前轮着陆以后，飞机就开始不平稳了。

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I do not like the plane because I am not the one behind the wheel.

我讨厌飞机是因为操控方向盘的不是我。

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When British Airways had a plane whose wheel was stuck in a down position.

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Passengers who saw a wheel fall off a plane as it took off did not immediately inform the crew, a report has said.

BBC: Flybe plane passengers 'saw wheel fall off'

Some passengers saw the wheel fall as the plane's landing gear retracted just after take off, but "they did not inform the cabin crew at this point", the report said.

BBC: Flybe plane passengers 'saw wheel fall off'