earth
[NOUN]
1. [SING 单数型名词] 地球
Earth or the Earth is the planet on which we live. People usually say Earth when they are referring to the planet as part of the universe, and the Earth when they are talking about the planet as the place where we live.
近义词
双语例句
例：The space shuttle Atlantis returned safely to Earth today.
亚特兰蒂斯号航天飞机今天安全返回地球。
例：a fault in the Earth's crust.
一个地壳断层。
2. [SING 单数型名词] 陆地 , 地面
The earth is the land surface on which we live and move around.
近义词
双语例句
例：The earth shook and swayed and the walls of neighbouring houses fell around them.
地面晃动起来，周围房子的墙体在他们身边坍塌了。
3. [U 不可数名词] 土壤 , 土地
Earth is the substance on the land surface of the earth, for example clay or sand, in which plants grow.
近义词
双语例句
例：The road winds for miles through parched earth, scrub and cactus.
那条路蜿蜒数英里，穿过干热的土地、灌木丛和仙人掌，。
4. [SING 单数型名词] 地线
The earth in an electric plug or piece of electrical equipment is the wire through which electricity passes into the ground and which makes the equipment safe.
双语例句
例：The earth in the lamp was not connected.
这盏灯的地线没有接上。
NOUN. 名词
on earth
1. 到底 , 究竟
On earth is used for emphasis in questions that begin with words such as 'how', 'why', 'what', or 'where'. It is often used to suggest that there is no obvious or easy answer to the question being asked.
双语例句
例：How on earth did that happen?
那到底是怎么发生的？
2. 根本（常用在否定句中）
On earth is used for emphasis after some negative noun groups, for example 'no reason'.
双语例句
例：There was no reason on earth why she couldn't have moved in with us.
她没能跟我们一起搬进来，这根本就没有道理。
down to earth , back to earth
1. （激动之后）恢复正常生活 , 回到现实
If you come down to earth or back to earth, you have to face the reality of everyday life after a period of great excitement.
双语例句
例：When he came down to earth after his win he admitted: 'It was an amazing feeling.'
当从胜利的喜悦平静下来后，他承认：“当时感觉太棒了。”
PHRASE. 习语
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