Further out there are only traces of such débris, some bubbles, spots, etc. 佚名.神奇的知识之书.
The lower levels of mountains are frequently buried several feet under débris which has been formed in this way from higher peaks, and which has slowly accumulated at the lower levels. 伯莎M.克拉克.科学通论.
Heat plays an important part in the splitting of rocks and in the formation of débris. 伯莎M.克拉克.科学通论.
Finally a breach in the walls was made, and the Macedonians, clambering up the débris from their ships, stormed the city. 赫伯特·乔治·威尔斯.世界史纲.