closing layer

例句：

1. 1.The engineer carefully removed the old wooden door to reveal the hidden treasures beneath the closing layer.
   工程师小心翼翼地拆除了旧木门，以露出隐藏在封闭层之下的宝藏。
2. 2. In the final stage of construction, the builders carefully closed the openings in the floor with a layer of waterproof material.
   在建筑的最后阶段，建筑工人小心地用一层防水材料封闭地板开口。
3. 3. The scientist discovered that the bacteria were living in a layer of sedimentary rock, which wascrucial for their survival.
   科学家发现细菌生活在沉积岩的一层中，这对于它们的存活至关重要。