番譯`````中譯英!![急!!]

Mars is in solar system the third small planet diameter approximately is the Earth 1/2, the volume approximately is the Earth 1,/10, the superficial gravity Earth 1/3 is approximately strong, the period of rotation is 24 hours 37 minute. Mars's atmosphere is thinner than the Earth, only has the earth's atmosphere 1%, the principal constituent is a carbon dioxide. Simultaneously also has the few cloud layers and the early morning fog, but the water only accounts for the atmospheric proportion 0.0300 ratio, extremely 乾燥. Mars's Northern Hemisphere has many the young great plains which forms by the coagulation volcano lava, the southern hemisphere has many craters and the big hit basins, moreover also has the volcano which several big, the oneself extinguishes, but also some many canyons and branch river bed. On Mars also has the spring, the summer, the fall, the winter four seasons, each season Earth is probably longer than two time of long. A Mars day is also similar with the Earth. The daily length is Earth's 24 hours 37 minute. but a Mars year Earth is longer than two times, probably is 687 Earth day. The mars atmosphere ingredient is: Carbon dioxide, nitrogen, argon, oxygen, carbon monoxide, as well as few water, nitrogen oxide, 氖氣, 氪氣, 氙氣 and HDO. Mars's structure: A. mainly for the carbon dioxide rarefied atmosphere B. surface even 均溫 for Celsius below zero 40, the solid lithical earth's crust includes the water to form the ice to freeze the level, is thick approximately 40 to 50 kilometer C. the silicates crag place letter thick approximately 2,000 kilometer D. solid lithical core diameter approximately is 2,500 kilometers

Mars is the third small planet in solar system. Its diameter is about one over two of Earth's. Its volume is about one over ten of Earth's. The force of gravity on its surface is about one over three of that on Earth. Its rotation period is twenty-four hours and thirty-seven minutes. The atmosphere of Mars is thinner than the one of Earth, only one over a hundred of the atmosphere of Earth. The main composition of the atmosphere of Mars is carbon dioxide, but it also contains a little cloud layer and some fog in the morning. Water only occupy zero point zero three per cent of the specific gravity of the atmosphere of Mars, it's very dry.There are many young and big champaigns made of lava that is already solidified and came from volcanos in the Northern Hemisphere of Mars. In the Southern Hemisphere, there are lots of craters and large basins that created after something bombed onto the earth. There are also some large and already burned out volcanos, and many gorges and divergent riverbeds.

Mars also has spring, summer, autumn and winter four seasons, each season is longer than Earth's about two times. A day on Mars is almost the same long as a day on Earth. On Mars, everyday has twenty-four hours and thirty-seven minutes, but a year on Mars is longer than a year on Earth two times, it's about six hundred and eighty-seven days on Earth.

The composition of the atmosphere of Mars: carbon dioxide, nitrogen, argon, oxygen, carbon monoxide, a little bit water, nitrogen oxide, neon, krypton, xenon and HDO.

The structure of Mars:

A. A thin atmosphere mainly contains carbon dioxide
B. The average temperature of the surface is fourty below zero degree Celsius. There is a layer of ice made by water in the crust made by solid stone, it's about fourty to fifty kilometers
C.The thickness of the mantle made by silicate rock is about two thousand kilometers
D.The diameter of the core made by solid stone is about two thousand five hundred kilometers

對不起，我不知甚麼是「地函」，所以就用了「mantle」（地幔）。

2008-02-04 13:40:30 補充：
有些少改動，在火星的結構：B. The average temperature of the surface is fourty below zero degree Celsius. There is a layer of ice made by water in the crust made by solid stone, it's about fourty to fifty kilometers thick多了個「thick」字。

2008-02-06 00:13:08 補充：
有 thick 是對的，無 thick 是錯的。

2008-02-16 23:42:29 補充：
文中有中文，並沒有全部翻譯為英文，而且還有些少錯。