英语语法分析

The birds were checking bivouacs when they were not hungry, a behaviour that does not make sense until the next morning.

鸟儿在不饿的时候查探蚁窝，这种行为不到第二天早上讲不通。

There are at this day certain traces recognizable, such as old boles of burned trees, which mark the site of these poor bivouacs trembling in the depths of the thickets.

今天还留下当年的一些痕迹，例如一些烧焦了的古树干，便标志着那些惊慌战栗的难民在树林里露宿的地点。