“说服力”造句

在那次晚宴上，我听到他作了一番非常有说服力的陈词。
I heard him make a very eloquent speech at that dinner.

书中的有些论述肤浅琐碎，毫无说服力。
Some of the discussion in the book is lightweight and unconvincing.

他的推销词流畅又有说服力。
His sales pitch was smooth and convincing.