Archaeologists soon used plastic sheets to cover them for protection.
考古专家随即就用塑料纸覆盖表面作为保护。
You can get just a simple plastic underlay sheet and that would provide adequate protection.
你可以只要简单地将塑料垫板、提供足够的保护。
The casing is made by fireproofing plastic and is good for environmental protection.
外壳使用放火阻燃塑料制成，有益环保；
The casing is made by fireproofing plastic and is good for environmental protection.
外壳使用放火阻燃塑料制成，有益环保；
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