我要有关遇见外星人的英语演讲稿（一分钟以内的，要有对话，限今晚之内）

一、我要有关遇见外星人的英语演讲稿（一分钟以内的，要有对话，限今晚之内）

Through all of our history we have pondered the stars and muse whether humanity is unique or if,somewhere else in the dark of the night sky,there are other beings who contemplate and wonder as we do,fellow thinkers in the cosmos.Such beings might view themselves and the universe differently.Somewhere else there might be very exotic biologies and technologies and societies.In a cosmic setting vast and old beyond ordinary human understanding,we are a little lonely;and we ponder the ultimate significance,if any,of our tiny but exquisite blue planet.

二、关于天文学的英语演讲短文

Also known as the Moon Taiyin, commonly known as the moon [1]. The Earth are the only natural satellite. Moon is the most obvious examples of natural satellites. In the solar system, with the exception of Mercury and Venus, the other planets have natural satellites. There is around the age of the moon 4.6 billion years. Has the moon shell, mantle, core, such as Hierarchy. On the outermost shell of average thickness of about 60-65 km. Shell month following the month are 1000 kilometers deep mantle, it accounts for most of the size of the moon. Mantle on the following month are nuclear, nuclear month temperature of about 1000 degrees, melting is likely to be the status. The Moon about 3476 kilometers in diameter, are of the Earth 3 / 11, Sun 1 / 400. The size of the moon the Earth is only 1 / 49, the quality of about 7350 quadrillion tons, equivalent to the quality of the Earth 1 / 81, the lunar surface gravity of the Earth gravity is almost 1 / 6.

三、急！保护我们的星球的英语作文60~70个字就行

As time goes by, man is making the earth sick. People cut down too many trees and leave rubbish everywhere. Factories let out their waste without doing anying to it . This has cause some serious problems.

Such as the land is sandy, the river is dirty, the air is less clean, even the temperature of the earth is rising. What should we do to save the earth ?

My suggestion is that we should plant more trees, put rubbish into dusbins and stop factories pouring waste directly into the air or rivers. In all, we have only one earth, we should do our best to protect it, or we will regret.

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