He boasted that he could speak six languages fluently.是什么意思？

He boasted that he could speak six languages fluently.

他自夸自己能流利地讲6种语言.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

boasted

v. 有（引以为荣的事物）( boast的过去式和过去分词 )，扬言；

例句
Witnesses said Furci boasted that he took part in killing them...
几位证人声称富尔奇曾吹嘘自己参与了对他们的屠杀。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

speak

vt.& vi. 讲，谈，演说，从某种观点来说；

例句
Do you speak any foreign languages?...
你会说外语吗？

six

n. 六，六个，六岁，六点；num. 六，六个；

例句
...the acquittal of six police officers charged with beating a suspect...
对6名被控殴打嫌犯的警官作出的无罪判决

languages

n. 语言( language的名词复数 )，表达方式，（某民族、某国家的）语言文字，计算机语言；

例句
In African languages there is a close correspondence between sounds and letters.
非洲语言中的发音与字母关系密切。

fluently

adv. 流利地，流畅地；

例句
Alex didn't read fluently till he was nearly seven.
亚历克斯快到7岁时才能流利地阅读。