These grooves help a slider fly on the certain height.

这些沟槽帮助滑块一定的高度上飞行。

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So far, their project features drones acting as flying tables that adjust to your height, fly away once you're done, or auto-eject if you start using the wrong pen on your homework.

到目前为止，这项以智能飞翔为特点的家具计划中，有会飞的桌子能自动适应你的身高，一旦工作完成，它会自动飞离；

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Now I can not have that dream any more. And I've made it clear that why I had the strange dream and why I could only fly in a limited height and could not fly away forever in my dream.

现在我不再做这个梦了，同时，我也想明白了自己为什么会重复做那样奇怪的梦，而且为什么在梦里，我只能飞那么一点点高，一点点远。

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This suggested that the private jet had strayed from its original flight plan, but, in statements to police, the pilots said they had been authorised to fly at that height.

BBC: NEWS | Americas | US pilots blamed in Brazil crash

"At the height of fly season, you can only use one leg, sometimes even just one foot, " says Koala.

BBC: Burkina Faso: Beating river blindness by fly-catching

While the park has added newer amusements, most visitors come for the vintage attractions, including a two-tier carousel built in 1921, the Talaia, which raises guests with a rickety metal arm to a height of 550m above sea level, and the iconic Avio ride, modelled on the first plane to fly between Barcelona and Madrid.

BBC: Europe��s grand old theme parks