n.  底部，基部；下端，末尾 ≠ the top

n. 〔物体的〕平底

n.  最低职位；最底层

a.  底下的，底部的

a.  最不重要的，最末的，最差的

• get to the bottom of sth  找出某事的起因

• from the bottom of your heart 

  从心底里，由衷地

• They found millions of coins on the bottom. 底部

• From the bottom of our hearts, we would like to deeply thank each and every person that stopped by! 衷心感谢

• Their massive wake creates waves at the bottom of the sea, weakening the foundations of the centuries-old buildings themselves. 在海底

• While the “five-second rule” might not seem like the most pressing issue for food scientists to get to the bottom of, it’s still worth investigating food myths like this one because they shape our beliefs about when food is safe to eat.

• Higgins had started at the bottom.

  希金斯从最低的职位做起，一步一步升至总经理的位置。

• I never got to the bottom of this!

  这件事我从来都没有弄明白！

• I was bottom of the class in Spanish.

  我的西班牙语在班上是最后一名。