自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-PROPER 地球（指宇宙组成部分时用Earth，指人类居住的星球时用the Earth） 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.
The space shuttle Atlantis returned safely to earth today. “
...a fault in the Earth's crust.
N-SING 陆地;地面 The earth is the land surface on which we live and move about.
The earth shook and the walls of neighbouring houses fell around them.
N-UNCOUNT 泥土;土壤;土地 Earth is the substance on the land surface of the earth, for example clay or sand, in which plants grow.
The road winds for miles through parched earth, scrub and cactus...
They will revert to tilling the earth in an old-fashioned way.
N-COUNT （狐等的）洞穴 An earth is a hole in the ground in which an animal such as a fox lives.
N-SING （接）地线 The earth in an electric plug or piece of electrical equipment is the wire through which electricity can pass into the ground, which makes the equipment safe if something goes wrong with it.
The earth wire was not connected.
PHRASE （用于以how, why, what 或 where 开始的问句，表示强调，通常表示问题没有答案或很难回答）究竟，到底 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.
How on earth did that happen?...
What on earth had Luke done?...
PHRASE （用于否定名词短语后表强调）根本，完全 On earth is used for emphasis after some negative noun groups, for example 'no reason'.
There was no reason on earth why she couldn't have moved in with us...
There is no feeling on earth like winning for the first time.
PHRASE (用于包含形容词最高级的名词短语后表示强调)世界上，人世间 On earth is used for emphasis after a noun group that contains a superlative adjective.
He wanted to be the fastest man on earth.
...the site of the worst ecological disaster on earth.
PHRASE （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.
When he came down to earth after his win he admitted: 'It was an amazing feeling'...
I was shocked, brought down to earth by this revelation.
PHRASE （经过长时间的寻找后）终于找到 If you run someone or something to earth, you find them after searching for them for a long time.
She ran him to earth in the pub at five to one.
PHRASE 价格不菲/斥巨资 If you say that something cost the earth or that you paid the earth for it, you are emphasizing that it cost a very large amount of money.
It must have cost the earth.