Its shock wave tumbled chips off the rock ledge they had vacated.

它的冲击波从他们腾出的岩石壁架上滚落下来。

Sam finds his way to the bush, picks the best fir tree and chops it down, and chips off unwanted branches.

山姆找到了通往灌木丛的路，挑选了最好的枞树并将其砍倒，并砍掉了不需要的树枝。