He argued his case with considerable subtlety.是什么意思？

He argued his case with considerable subtlety.

他相当机敏地为自己的论点辩护。

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。

argued

adj. 引起争论的；v. 争吵，辩论( argue的过去式和过去分词 )，坚决主张，提出理由证明，说服；

例句
It could be argued that the British are not aggressive enough.
可以说英国人不够强势。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

case

n. （实）例，事例，情况，状况，诉讼（事件），案件，判例，容器（箱，盒）；vt. 把…装入箱（或盒等）内，加盖于，包围，围住，[俚语]（尤指盗窃前）探察，侦查，窥测；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

considerable

adj. 相当大（或多）的，该注意的，应考虑的；

例句
Despite considerable pain she has been getting out and about almost as normal...
尽管还很痛，她已经基本上行动如常。

subtlety

n. 精妙，巧妙，敏锐，敏感，狡猾，阴险，细微的差别等；

例句
In time you'll appreciate the beauty and subtlety of this language.
总有一天你会体会到这门语言的优美和微妙之处。