A rare bird among the X-Planes, it was designed to take off from the ground and under its own power.

阿中的X -飞机罕见的鸟，它的目的是从地面起飞，并根据其自己的力量。

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Unlike most other X-Planes, the X-48B isn't designed for supersonic flight; rather, it's meant to study ways to create quieter, more fuel-efficient aircraft.

与大多数其他X -飞机，就X - 48b是不适合超音速飞行，相反，它的目的是研究如何建立更安静，更省油的飞机。

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OK, so, if I have a point, at any point, I can slice the graph of my function by two planes, one that's going along the x, one along the y direction.

如果我有一个点，任意一点，我可以用2个平面把函数图像切开，一个是沿x方向，一个沿y方向。

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They took a crystal, this is a single crystal of nickel that has regular planes of atoms, and those planes are spaced on the order of an angstrom or less apart, and they irradiated this with x-rays.

他们取了个晶体,一个具有规则原子平面的，镍晶体,这些面间距差不多也是一埃或者更少，它们放射出X射线。

麻省理工公开课 - 固态化学导论课程节选

Meanwhile, CFM International, a joint venture between GE and SNECMA which provides engines for more than 60% of Boeing's and Airbus's planes, is promoting a rival design called Leap-X.

ECONOMIST: New competition for Airbus and Boeing