earth
单词辨析：
指人类居住的星球。
71% of the earth's surface is sea.
地球表面71％的面积是海洋。
He must be the happiest person on earth!
他准是世界上最幸福的人！
通常与定冠词 the 连用，指我们生活的世界，尤用于强调范围之大。
Their goods are exported all over the globe.
他们的商品出口到世界各地。
His travels have taken him to every corner of the globe.
他游遍了世界各地。
通常与定冠词 the 连用，多指地球上的世界，包含其中的国家、社会和人。
The Second World War broke out in 1939.
1939年爆发了第二次世界大战。
He is the tallest man in the world.
他是世界上个子最高的人。
This toy robot is the latest craze all over the world.
这种玩具机器人最近风靡全世界。
相关例句：
The similarities between Mars and Earth were enough to keep alive hopes of some form of Martian life.
火星和地球之间的诸多相似处足以让人们对火星上存在某种生物抱以希望。
I was shocked, brought down to earth by this revelation.
真相的披露让我深感震惊，我被带回了现实。
The road winds for miles through parched earth, scrub and cactus
公路蜿蜒数英里，穿过炙烤的大地、灌木丛和仙人掌。
When he came down to earth after his win he admitted: 'It was an amazing feeling'
从胜利的喜悦中平复后，他承认：“当时感觉棒极了。”
Why on earth would he want to go to such a place?
他到底为什么想去那么个地方？
The spacecraft burned up when it re-entered the earth's atmosphere.
宇宙飞船重新进入地球大气层时烧毁了。