On the Earth / In the Earth???

如果你的意思是"在世界上"
應用 on earth / in the world
注意, on earth 不用加 "the", 而且不用大階

eg: I'm the luckiest person on earth / in the world ! 我是世上最幸運的人!

但如果你指"地球", 即 the Earth

2007-01-01 20:20:03 補充：
如果指在地殼上面, 可用 "on the surface of the Earth"如果指在地球內部, 可內 "within the Earth" or "inside the Earth"

In the Earth is correct

Earth 是個球體.

如果你指的是在球體的表面, 是on the Earth. 例如我們就住在地殼的表面. 所以是 We live on the Earth.

如果你指的是在球體的裏面, 是in the Earth. 但是要在球體裏面, 你可能要深入地殼之內.

In the Earth is correct because is係個地球入面.,,,,

It's on the Earth,
If you are in the Earth then you are really IN IT.