查词历史：

at this distance of time at the foot of at the end of one's wits at the climb at the approach of at swords' points at sunrise at sixes and sevens

at this distance of time
生词本

1. At this distance of time it is difficult to date the fossil.
时间隔得这么久了，很难确定这化石的年代。

来自《现代汉英综合大词典》