ground :
n. 地面,场地,阵地,基础;理由,根据,原因
v. 把…放在地上,建立,以…为基础
例句:
I have to grind the knife; it is blunt.
我得磨刀;它钝了。
The falling leaf spiralled to the ground.
落叶盘旋着飘到了地上.
floor:
n. 基底
n. 地板,楼层,底部,底价
vt. 铺地板,打倒
例句:
The bathroom floor was swimming with water.
浴室的地面上都是水.
The lion paced the floor of its cage.
狮子在笼里踱来踱去。