In the case of a plane, it's the difference in pressure on the top and bottom of its wings that keeps the craft afloat.

以飞机为例，它双翼上方与下方的压力各不相同，正是这不同的压力使得飞行器保持悬浮。

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Trading is closer to flying a plane than to mopping a floor, meaning you'll need to invest a lot of time and energy in mastering this craft.

交易和开飞机非常一样难，而不是用拖把拖地那么简单，这意味着你需要花费很多时间和精力去掌握它。

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The building's crown jewel is a Modular Egress Training Simulator, a plastic and metal craft that can be arranged to resemble the cockpit of almost any helicopter or small plane on the market.

这座建筑里最重要的设备是一台模块化训练模拟器（Modular Egress Training Simulator），它是一架塑料和金属材质的航空器，可以用来模拟市面上几乎所有直升机或小型飞机的驾驶舱。

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It marks his first space venture since the partnership with Rutan and his colleagues to build the prize-winning SpaceShipOne rocket plane, which became the first privately developed craft to reach outer space in 2004.

FORBES: The John Galts of the Future Will Build Galt's Gulch in Space

However, when the U.S. fighters spotted the Iranian plane, they closed to within two miles of the approaching craft.

WSJ: U.S. Fighters Warned Off Iranian Jet