to  be  at the bottom of  something
be
æt
āt
at
ðə
dhē
the
bɒtəm
botēm
bottom
əv
ēv
of
something

“ be at the bottom of something ”的英语定义和含义

to be at the bottom of something
01

to be the direct cause of something, particularly something unpleasant 

习语
非正式
例子
The detective believed that a personal grudge was at the bottom of the crime. 
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