And so we removed those plastic sheets, remove the Jurassic clay, and start to expose some more of the skeleton.

打开塑料袋，把侏罗纪时期的土移开，然后再开始挖掘出更多的骨架。

They move from building from bamboo, tarpaulin sheets, plastic, to cardboard, to tin, to bricks and cement, just like the way we do.

他们从竹子、防水布、塑料到硬纸板、锡、砖和水泥，就像我们做的那样。