The king was on a privatevisit to enable him to pray at the tombs of his ancestors.
国王在做一次私访以便能祭拜其祖坟。
《柯林斯英汉双解大词典》
2
A PRIVATEvisit to the castle of Vaduz in Liechtenstein is a treat for many reasons.
私下到列支敦士登的瓦杜兹堡一游乃一大快事，之所以叫快事，理由多着呢。
3
These visits including the state visit, the friendly visit, the working visit, the study visit, each kind of service visit, and the unofficial privatevisit and so on.