I have not the haziest notion of what he means .

我完全不懂他究竟是什么意思。

Fig there remained only the haziest memories of that childhood birthday party .

那次童年的生日聚会只留下了朦胧的回忆。

To be blunt , most britons under 40 have only the haziest knowledge of the empire : history is not their strongest suit .

坦白说，大部分40岁以下的英国人对大英帝国的了解相当模糊：历史不是他们的最强项。