地基的用法和樣例：
例句
-
洪水退後地基下陷了（兩英尺）。
The foundations sank (two feet) after the flood. -
獾在這座教堂的地基處打了洞。
Badgers had undermined the foundations of the church. -
由於地基不牢，這所房子已下陷。
Weak foundations caused the house to subside. -
這地基不夠牢固，無法承受房屋的重量。
The foundations were not strong enough to sustain the weight of the house.
