base 侧重指构成或支撑某一具体物体的基础，也可指军事基地或用作比喻意义。
basis 主要用作抽象或引申意义。
foundation 用于具体意义时，侧重指坚固结实的建筑物的基础或地基；用作比喻意义时，与basis基本相同。
ground 含义与basis和foundation接近。一般指某种决定、论点或关系的基础，也可指某种原因的基础。
参考例句
1. The boxer grounded his opponent. 这名拳击手把对手打翻在地。
2. Ground and Foundation. 地基与基础“，”
3. Ground control point? 地面控制点?
英英解释
n.
1. the solid part of the earth's surface
2. a rational motive for a belief or action
3. the loose soft material that makes up a large part of the land surface
4. a relation that provides the foundation for something
5. a position to be won or defended in battle (or as if in battle)
6. the part of a scene (or picture) that lies behind objects in the foreground
7. material in the top layer of the surface of the earth in which plants can grow (especially with refe
8. a relatively homogeneous percept extending back of the figure on which attention is focused
9. a connection between an electrical device and a large conducting body, such as the earth (which is t
10. (art) the surface (as a wall or canvas) prepared to take the paint for a painting
11. the first or preliminary coat of paint or size applied to a surface v.
1. fix firmly and stably
2. confine or restrict to the ground
3. place or put on the ground
4. instruct someone in the fundamentals of a subject
5. bring to the ground
6. hit or reach the ground
7. throw to the ground in order to stop play and avoid being tackled behind the line of scrimmage
8. hit a groundball
9. hit onto the ground
10. cover with a primer; apply a primer to
11. connect to a ground
12. use as a basis for; found on
