优秀的作文都有个共性就是有效地使用了语句间的连接成分，使全文结构紧凑。文章的连贯性和紧凑感是很重要的。句子作为最小的表达意思的语言单位，如果只是被随意的整合，是无法达到有效表达的目的。下面是总结出来的经典的十大连词，以及他们的替换用法，这样大家写作和阅读的时候，就可以用得更加多选择啦!
Maybe many people know the universe is very big. Some scientists thought the universe seems to be rapidly expanding its component galaxies moving ever farther apart. So it's very big. There are many heavenly bodies in the universe. If you stand in space, you will see many beautiful stars, like sun and other planets.
And then, let's recognize our solar system. There are eight planets in our solar system. They're Mercury, Venus, Earth,Mars, Jupiter, Saturn, Uranus and Neptune. The Sun is very hot. Its surface has 5600℃. Itsgravitation is very strong. So the Earth goes around Sun. And the Earth is our home. We're living on the Earth, and it is the most beautiful in the solar system. It has lots of water and plants. And the moon is the Earth's partner. It goes around the Earth. And other planets are very far from the Earth. So the people can't reach them and none of them has an environment with air. The people also can't live in them.
Finally, let’s see in the sky in the night. There is much beautiful and magic view in the universe.
大概翻译：也许不少人知道宇宙是非常大的。一些科学家认为宇宙似乎是迅速扩大其组成的星系移动过远。因此这是非常大的。有许多在宇宙天体。如果你站在空间，您会看到许多美丽的像太阳和其他行星恒星。
然后，让我们认识到我们太阳系。有8个在我们的太阳系行星。他们是水星，金星，地球，火星，木星，土星，天王星和海王星。太阳是很热。它的表面有5600℃。它的引力非常强大。因此，地球去周围周日地球是我们的家。我们生活在地球上，它是最美丽的太阳系。它有大量的水和植物。而月球是地球的合作伙伴。当然环绕地球。和其他行星很远离地球。因此，市民不能达到这些目标，而其中没有一个是环境与空气。人民也不能住在其中。
最后，让我们在天空中看到的夜晚。有许多美丽而神奇的宇宙观点。
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