中国测试新型月球轨道飞行器
英语课
BEIJING, Aug. 10 (Xinhua) -- China is preparing for the launch of an experimental recoverable moon orbiter, said the State Administration of Science, Technology and Industry for National Defence on Sunday.
The orbiter arrived in Xichang via air in southwest China's Sichuan Province on Sunday and then transported to the Xichang Satellite Launch Center, according to a statement from the administration.
The launch will take place before the end of this year, it said.
The plan is for the orbiter to be launched into lunar orbit and return to Earth at an escape velocity 1 of 11.2 km per second.
China to test recoverable moon orbiter
The orbiter is one of the test models for China's new lunar probe Chang'e-5, which will be tasked with landing on the moon, collecting samples and returning to Earth.
The launch is aimed at testing the technologies that are vital for the success of Chang'e-5, the statement said.
China launched the Chang'e-3 lunar probe with its moon rover, Yutu, in late 2013. Chang'e-3 successfully landed on the moon and Yutu operated well until its control mechanism 2 failed in January.
As the backup probe of Chang'e-3, Chang'e-4 will be adapted to verify technologies for Chang'e-5.
The more sophisticated Chang'e-5 mission, including unmanned sampling and returning, requires technological 3 breakthroughs in moon surface takeoff, sampling encapsulation, rendezvous 4 and docking in lunar orbit, as well as high-speed Earth reentry.
n.速度，速率
- Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
- The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
n.机械装置；机构，结构
- The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
- The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
adj.技术的；工艺的
- A successful company must keep up with the pace of technological change.一家成功的公司必须得跟上技术变革的步伐。
- Today,the pace of life is increasing with technological advancements.当今， 随着科技进步，生活节奏不断增快。
n.约会，约会地点，汇合点；vi.汇合，集合；vt.使汇合，使在汇合地点相遇
- She made the rendezvous with only minutes to spare.她还差几分钟时才来赴约。
- I have a rendezvous with Peter at a restaurant on the harbour.我和彼得在海港的一个餐馆有个约会。
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月球