• 1. Utterly Ignorant Of: 一窍不通
• 2. be utterly ignorant of: 一无所知 | 完全无知 | 一窍不通

• 1.Hitherto he had been utterly ignorant of it, but now it beat full in his face.
  他从前是一直没有经验过的，可是，现在整个迎着他的脸上袭了来。
  dict.yoduao.com

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