The airline has said the plane had engine difficulties after takeoff and returned to Naha.

航空公司表示飞机起飞后发动机出现问题，然后返回了那坝。

A carrier aircraft carries it high into the atmosphere and releases it before its rocket engine fires.

航空母舰将高空带入大气层，并在火箭发动机点火之前将释放。

And it's near that airport that a major U.S. airline has just opened a massive facility where jet engines are tested.

就在机场附近，美国家主要航空公司刚刚开设了个大型设施，用于测试喷气发动机。

So these are things like aviation services and systems and commercial and military engines.

所以这些就是航空服务和系统以及商业和军用发动机。

According to Qantas, a broken Rolls-Royce  engine had stranded one of its Boeing 747s in Johannesburg, South Africa.

据澳洲航空称，台损坏的劳斯莱斯发动机导致架波音 747 飞机滞留在南非约翰内斯堡。

So why did Qantas operate a commercial Boeing 747 flight with five engines, and  how did the airline manage it?

那么，为什么澳洲航空运营架配备五台发动机的波音 747 商用飞机，航空公司又是如何管理的呢？

The act of burning kerosene and other aviation fuels to power jet engines and propellers means carbon dioxide emissions, among other types of pollution.

燃烧航空煤油或航空燃料给喷气式发动机和螺旋桨功能，意味着会产二氧化碳排放，还会产污染。

The Japan Aerospace Exploration Agency explained that the ignition for the second stage failed, and the rocket would not have made it into orbit.

日本宇宙航空研究开发机构解释说，第二级发动机点火失败，火箭就无法进入轨道。

Emirates Airline president Tim Clark disagrees with critics who say the days of large four-engine planes like the A380 are in the past.

有人说属于A380这样有四个大型发动机的飞机的时代已经过去了，阿联酋航空总裁蒂姆·克拉克不赞同这样的批评意见。

General Electric, America's troubled engineering giant which supplies max engines in a joint venture with Safran, a French aerospace company, faces a bigger bill.

美国陷入困境的工程巨头“通用电气”，在与法国航空航天公司“赛峰”的合资企业中提供max发动机，面临着更大的开支。

Annual filings show that Larry Culp, boss of GE, whose jet-engine business stalled as aviation nosedived, earned $73m, almost triple his total pay in 2019.

年报显示，通用电气的喷气发动机业务因航空业的落千丈而陷入停滞，但首席执行官拉里·卡的年薪为7300万美元，几乎是2019年总薪酬的三倍。

The National Transportation Safety Board says a preliminary exam shows evidence of metal fatigue on the Southwest Airlines jet engine that blew apart amid air.

美国国家运输安全委员会(National Transportation Safety Board)表示，初步检查结果显示，西南航空(Southwest Airlines)的喷气发动机出现了金属疲劳现象，致使引擎在空中爆炸。

A report by Yeti Airlines says the pilot of last month's doomed flight in Nepal said there was no power from the engines before the plane crashed.

雪人航空公司的份报告称，上个月在尼泊尔失事的飞行员曾表示，飞机坠毁前发动机失去动力。

He liked Mr. Calhoun and Mr. McNerney once ran GE's aviation business which is Boeing's biggest engine supplier Search man brought with them.

他喜欢卡尔霍恩先和麦克纳尼先，他们曾经掌管过通用电气的航空业务，这也是波音最大的发动机供应商搜索曼带来的。

Biden and Modi plan to announce that the U.S. will permit General Electric to partner with India-based Hindustan Aeronautics to produce jet engines for Indian military aircraft.

拜登和莫迪计划宣布，美国将允许通用电气公司与总部位于印度的印度斯坦航空公司合作，为印度军用飞机产喷气发动机。

They are mainly used when the  aircraft is parked on the ground, allowing airlines to keep their fuel-consuming  engines switched off as ground tasks are completed.

们主要在飞机停在地面时使用，使航空公司能够在地面任务完成时关闭耗油的发动机。

UNIDENTIFIED MALE: At Aviation High School, we take all your regular academic classes, English, Social Studies, Physical Education but then also we have ground operations, carborative magnetos, jet engines.

在航空高中，我们的常规课程和你们的样，英语、社会研究、体育，但我们也有地面上的需要操作的课程，比如碳磁发电机和喷气发动机。

And because of that engines, airplanes, airports, fuel supply chains and regulations, they are all built on flying planes from point A to point B that run on jet fuel.

因此，发动机、飞机、机场，燃料供应链和法律法规，全都建立在全程使用航空燃料完成从 A 点到 B 点的航线这样的规划之上。

Although we don't know how frequently this occurred throughout 747  operations, we do know through photographic evidence that ferrying an extra engine  was done by airlines all over the world.

虽然我们不知道在整个 747 运营中这种情况发的频率如何，但我们确实通过照片证据知道世界各地的航空公司都在运送额外的发动机。

Because we're designing a brand new aircraft, we can design the fuel system and the engine to use different materials that don't need those aromatics and enable us to truly use 100% sustainable aviation for.

因为我们正在设计架全新的飞机，我们可以设计燃料系统和发动机，以使用不需要那些芳烃的不同材料，使我们能够真正使用 100% 可持续航空。