我们在游乐场的地面上铺了一层木屑，防止孩子们摔倒受伤。

We spread a layer of ___woodchips on the playground surface to cushion kids' falls.

他们在农场用木屑作为生物燃料来取暖。

They use ___woodchips as biomass fuel for heating on the farm.

兔子笼子里铺的松木刨花需要每周更换一次。

The pine ___woodchips in the rabbit cage need to be changed weekly.