It's a loosely bound rubble pile as DART's closing images showed.

如 DART 的近距离图像显示的那样，它是一个松散结合的碎石堆。

It was also very low density, just what you'd expect for a loosely bound rock pile.

它的密度也很低，正如你所想象的的松散的岩石堆。

I managed to feel my way to the back stairway, tripping over bound piles of magazines.

我摸索着走到后楼梯，被一堆堆杂志绊倒。