be ignorant of

• 不知道, 不了解

be ignorant of的用法和样例：

例句

1. Some people are rather proud of being ignorant of such an important matter.
   有些人因不知道如此重要的一件事而颇感自豪。
2. To say you were ignorant of the rules is no excuse.
   说自己不知道规则是不能成为藉口的。