presumptuous

adj.

自以为是的，专横的，冒失的；

adv.

自以为是地，专横地，冒失地；

n.

自以为是，专横，冒失；

1. It is too presumptuous of him to do so.
   他这样做太放肆了。
2. I dislike that presumptuous young man.
   我不喜欢那个自以为是的年轻人。
3. He was presumptuous in making the announcement before the decision had been approved.
   决议尚未通过他已径自宣布。

Man's presumptuous brain
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