加un的否定前缀的所有单词

unlike；

uncomfortable；

uncertain；

unlucky；

unknown；

unfortunate；

unhappy；

unnecessary

The sound was not unlike that of birds singing.

这声音有点像鸟鸣。

Unlike his more famous namesake, this Bill Clinton has little interest in politics.

这位比尔克林顿和那位著名的同名人不同，对政治没什么兴趣。

She couldn\'t disguise the fact that she felt uncomfortable.

她无法掩饰她那不安的心情。