To protect it, we had to backfill on it again.
为了保护遗址，又将遗址进行了回填。
This article is good for promotion of backfill.
本文对充填技术的推广，具有一定的参考价值。
The self-tuning mechanism will backfill if necessary.
自优化机制将在必要时进行回填。
We backfill, kick some leaves around, drag over a small fallen tree.
然后我们把土填回坑里，踢过来一些树叶在上面，又拖过来一棵小枯树。
We backfill, kick some leaves around, drag over a small fallen tree.
然后我们把土填回坑里，踢过来一些树叶在上面，又拖过来一棵小枯树。
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