Unit 4 The Earth 地球 1. The important words, phrases and sentences This amazing planet is around 4.5 billion years old. 这个神奇的星球大约有四十五亿岁了。 About 70% of the Earth is covered by the sea. 地球表面大约70%的部分由海洋所覆盖。 As far as we know, out of all the planets in the solar system, only one, the Earth, can support life. 据我们所知，在太阳系所有的行星中只有一颗———地球，能够支持生命。 Some are freezing cold, like the North and South Poles. 有些地方极度寒冷，比如北极和南极。 The highest mountain on Earth is over 8,800 metres above sea level. 地球上最高的山海拔超过8800米。 The tallest trees in the world can reach over 100 metres in height. 世界上最高的树可以达到100米以上的高度。 The smallest plant is as small as a grain of rice. 最小的植物就像一粒米一样小。 Other animals, like birds, enjoy the wide open sky. 其他动物，如鸟类，享受着广阔的天空。 Big blue whales call the sea home, along with many amazing fish. 巨大的蓝鲸以及许多神奇的鱼类以大海为家。 And what’s more, the Earth provides us with all the things we need, such as food, water, air and energy. 更重要的是，地球为我们提供了需要的一切，比如食物、水、空气和能源。 Let’s explore, learn about and take care of our home. 让我们一起探索、了解和照顾我们的家园吧。 Fish and other sea animals eat plastic rubbish and get ill. 鱼类还有其他海洋生物吃塑料垃圾，从而感到不适。 People use a lot of dangerous farm chemicals. There is less and less clean groundwater. 人类使用了许多危险的农业化学品，由此干净的地下水越来越少。 People burn oil and gas to make energy. There are more and more harmful gases. 人们燃烧石油和天然气来获取能源。有害气体越来越多。 We want your ideas on how to protect the Earth. 我们想要你的关于如何保护地球的主意。 Sea animals are dying because of plastic pollution. 因为塑料污染，海洋生物面临灭绝的危险。 Bring our own shopping bags to the supermarkets. 带上我们自己的购物袋去超市。 For hundreds of years, the emperors went there to hunt. 数百年来，皇帝都会去那里狩猎。 There were forest fires and wars, and people cut down many trees. Saihanba slowly turned into a desert. 有森林大火还有战争，人类也砍伐森林。塞罕坝逐渐变成了沙漠。 When the forest disappeared, there were terrible sandstorms in the Beijing area. 森林消失后，北京地区出现了可怕的沙尘暴。 In the early 1960s, a group of scientists travelled to Saihanba to find a solution. 1960年代早期，一队科学家来到塞罕坝为找到一个解决办法。 The cold and dry weather made their work very difficult, and strong winds blew away many young trees. 寒冷干燥的气候使得工作开展异常艰难，强风把许多树苗吹跑。 Three generations of forest workers continued the hard work. 三代植树工作者持续接力这项艰难的任务。 2. Grammar There be结构 意义： 表示“存在”，某地有某东西、存在某个现象、有某事发生、有某数量等等 e.g. There is more and more plastic pollution in the sea. （某地存在某东西） There is a big difference between paper bags and plastic bags. The paper ones are friendly to the environment. （存在某个事实、现象） There are three of them sitting at ... ...
~~ 您好，已阅读到文档的结尾了 ~~
