And, the special case is if this coefficient of t turns out to be zero in the end, and that's actually going to happen, exactly when the line is either parallel or in the plane.

特殊情况下，如果最后t的系数恰好是0的话，实际上这是会发生的，当直线平行于或处于平面上。

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The Growler is able to keep its weapons charged up and humming by lowering special turbines into the airstream that rushes past the plane when it is flying.

咆哮者可将特制的涡轮机降至飞机飞过时留下的气流里来实现对武器进行充电并使其重新进入活跃状态。

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The Japanese space agency, JAXA, is actually testing the idea, using special heat-resistant paper, another of Toda's plane designs, and a Mach 7 wind tunnel.

日本的宇宙航空研究开发机构(JAXA)正在实验这一想法。该机构利用特制的耐高温纸，采用户田拓夫另一个飞机设计，在一处7马赫的风洞进行测试。

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Today,Frank Oliver and Doug Johnson tell about a special plane called Voyager and the effort to set a difficult world record.

VOA: special.2010.10.06

But engines are already operating at levels above 2, 500 degrees Fahrenheit, the melting point of the turbine blades that propel the plane, forcing engineers to dream up exotic cooling systems and turn to special coatings and unwieldy materials like ceramics.

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Plane travel, business lunches and dinners with clients, and conferences all require special planning for an employee with food allergies.

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The members of the 75th Ranger Regiment -- a U.S. special operations force -- were training at Joint Base Lewis-McChord when they jumped from a plane and got entangled in towering evergreen trees that canvass the sprawling military installation between Tacoma and Olympia.

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