be in the dark as to

私人生活 ... ... be heading for 朝……行进；注定要遭受 be in the dark as to 蒙在鼓里不知道 be obligeded to (出于道义)不得不 ...

... be in the dark about 完全不知道, 蒙在鼓里 be in the dark as to 完全不知道, 蒙在鼓里 before dark 黄昏前, 天黑前 ...