V to refill an excavated trench, esp (in archaeology) at the end of an investigation (尤指考古挖掘后)重新填埋坑、壕
N the soil used to do this 回填土
It is an actual three-dimensional structure, backfilled with sediment.
这是一个真实的三维结构，回填与沉积物。
They can be backfilled with concrete or plastered on the inside to beef them up.
它们可以回填混凝土或灰泥在里面的牛肉他们。
Cement piles (diameter 600mm) are foreseen under slab and inside the backfilled river.
地坪下和回填河道内采用直径600毫米的水泥搅拌桩。
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