阅读下面这一段英语文章,用一两句话概括主要内容(中文就可以)JIM TEDDER: It just may be the world’s most costly vacuum cleaner. The price of CleanSpace One is eleven million dollars. But yet, it has a big job to do. Recen
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阅读下面这一段英语文章,用一两句话概括主要内容(中文就可以)JIM TEDDER: It just may be the world’s most costly vacuum cleaner. The price of CleanSpace One is eleven million dollars. But yet, it has a big job to do. Recen
阅读下面这一段英语文章,用一两句话概括主要内容(中文就可以)
JIM TEDDER: It just may be the world’s most costly vacuum cleaner.
The price of CleanSpace One is eleven million dollars. But yet, it has a
big job to do. Recently, researchers in Switzerland announced plans to
build this new cleaning device. The researchers work at the Federal
Institute of Technology in Lausanne.
CleanSpace One will not be for use in homes or businesses. It will be
shot into space to help remove the thousands of pieces of space junk
floating around up there.
CHRISTOPHER CRUISE: Last year, we reported on the problem of space
junk. Over time, many unused spacecraft have hit each other far above
the Earth. Big pieces break into thousands of small pieces. Sometimes
they fall back into the atmosphere and burn up. But when they do not, it
creates big problems.
Scientists fear that if something is not done to remove these
objects, it may soon become too dangerous to send people and machines
into space. There is a large chance that they might crash into some of
this junk. So that is why the Swiss researchers are developing the new
device.
JIM TEDDER: CleanSpace One is not really a vacuum cleaner. It will
not be used to take away space junk. But scientists plan to move it
close to an old satellite that is no longer being used. Then a claw-like
instrument will seize the satellite, and force it back through the
atmosphere. There, the satellite will be destroyed by the heat of
friction with the air.
概括主要内容!
阅读下面这一段英语文章,用一两句话概括主要内容(中文就可以)JIM TEDDER: It just may be the world’s most costly vacuum cleaner. The price of CleanSpace One is eleven million dollars. But yet, it has a big job to do. Recen
太空垃圾的现状,对人类航天事业的危险及清除的必要性和方法.
太空垃圾需要被移除,在发生真正危害损失之前