These are all words for the lowest part of sth. 以上各词均指底部、最下部。

• bottom [usually sing.] the lowest part of sth 指底部、最下部：◆Footnotes are given at the bottom of each page. 脚注附于每页的下端。◆I waited for them at the bottom of the hill. 我在山脚下等他们。
• base [usually sing.] the lowest part of sth, especially the part or surface on which it rests or stands 指根基、基底、底座：◆The lamp has a heavy base. 这台灯的底座很沉。
• foundation [usually pl.] a layer of bricks, concrete, etc. that forms the solid underground base of a building 指地基、房基、基础：◆to lay the foundations of the new school 给新校舍打地基
• foot [sing.] the lowest part of sth 指最下部、底部：◆At the foot of the stairs she turned to face him. 她在楼梯底转过身来面对着他。

bottom or foot? 用 bottom 还是 foot？

• Foot is used to talk about a limited number of things: it is used most often with tree, hill/mountain, steps/stairs and page. Bottom can be used to talk about a much wider range of things, including those mentioned above for foot. Foot is generally used in more literary contexts. * foot 用于有限的一些事物，最常与 tree、hill/mountain、steps/stairs 和 page 等连用。bottom 适用的范围要广得多，其中也包括上面提到的与 foot 搭配的词。foot 一般用于文学性较强的语境中。

Patterns

• at/near/towards the bottom/base/foot of sth
• on the bottom/base of sth
• (a) firm/solid/strong base/foundation(s)