unexceptionable /ˌʌnɪkˈsɛpʃənəbəl/

• 1. 

  ADJ If you describe someone or something as unexceptionable, you mean that they are unlikely to be criticized or objected to, but are not new or exciting, and may have some hidden bad qualities. 无懈可击的 [正式]

  例：

  The candidate was quite unexceptionable, a well-known travel writer and TV personality.

  这个候选人无懈可击—著名的旅行作家和电视名人。

  例：

  The school's unexceptionable purpose is to involve parents more closely in the education of their children.

  学校无可指摘的目的是让家长更多的参与到孩子的教育中来。