Remember, the Angle between two planes is the same thing as the Angle between the normal vectors.

记住两个平面之间的夹角和，两个法向量之间的夹角是一样的。

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In recent decades the market has divided between short - and long-haul planes mainly made by two big competitors, Boeing and Airbus.

近几十年，空旅市场分别由两大劲敌波音和空客公司制造的短途和长途运输客机瓜分。

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Bagram is just 80km (50 miles) from Kabul, but most coalition troops and foreign workers fly between the two in huge military transport planes that barely take off before it is time to land again.

巴格拉姆距喀布尔只有80千米（50英里），但多数联军部队和外国工人都乘飞机往返——飞机刚起飞没多久就又要降落了。

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He must also impose at least two of six possible penalties, which include flight restrictions on Syrian planes and the limitation of diplomatic contact between the two countries.

BBC: NEWS | Middle East | Syria under US sanctions threat

Parts of the planes and debris were scattered between the two crash sites in a secluded and difficult to access area, state police said.

CNN: STORY HIGHLIGHTS

The assets also include two of the airline's helicopters, buses used to ferry passengers between planes, and the terminal and other machinery at the airport, Mr. Acharya said.

WSJ: Kingfisher's Lenders to Meet This Week