The first is, that while God's promise is sure, the manner and the timing of its fulfillment is quite unpredictable.

首先是，上帝的承诺是确定无疑的，但实现的方法和时机却都是不可知的。

耶鲁公开课 - 旧约导论课程节选

Now the surest sign of a hurdle is one of those pointed literary allusions that Milton makes in Lycidas, one of those remote allusions that Johnson had complained about.

如今关于这道坎的最确定无疑的迹象就是,他在里作出的那些文学臆想,即约翰逊曾经抱怨过的那些不切实际的幻想。

耶鲁公开课 - 弥尔顿课程节选