Sheetrock is almost done and soon we can start the finishing work.
石膏灰胶纸夹板已经做好了,我们很快就可以完工了。
2
The wood is inside the walls. The walls are made of sheetrock (the material inside the sheetrock is a mineral called gypsum).
墙由岩石块建成(岩石块里边的材料是叫做石膏的矿物)。
3
Earth's surface is not made up of a single sheet of rock that forms a crust but rather a number of "tectonic plates" that fit closely, like the pieces of a giant jigsaw puzzle.