These are all words for the surface that you walk on. 以上各词均指地面。

• floor the surface of a room that you walk on 指室内地板、地面：◆She was sitting on the floor watching TV. 她坐在地板上看电视。
• ground (often the ground) the solid surface of the earth that you walk on （常作 the ground）指室外地、地面：◆I found her lying on the ground. 我发现她躺在地上。◆The rocket crashed a few seconds after it left the ground. 火箭离开地面几秒钟便坠毁了。
• land the surface of the earth that is not sea 指陆地、大地：◆It was good to be back on dry land again. 回到陆地上真好。◆They fought both at sea and on land. 他们在海上和陆上都打过仗。
• earth (often the earth) the solid surface of the world that is made of rock, soil, sand, etc. （常作 the earth）指大地、陆地、地面：◆You could feel the earth shake as the truck came closer. 卡车开近时可感觉到地面在震动。

ground, land or earth? 用 ground、land 还是 earth？

• Ground is the normal word for the solid surface that you walk on when you are not in a building or vehicle. You can use earth if you want to draw attention to the rock, soil etc. that the ground is made of. Land is only used when you want to contrast it with the sea. * ground 常指建筑物或车辆外的地面。如果关注的是构成大地的岩石、土壤等可用 earth。land 只在与海相对照时使用：◆the land beneath our feet◆feel the land shake◆sight ground/earth◆travel by ground/earth

Patterns

• on/under the floor/ground/earth
• bare floor/ground/earth
• to drop/fall to the floor/the ground/(the) earth
• to reach the floor/the ground/land