It's very difficult to sketch the whole picture of prehistoric art just according to very limited fossil materials.
根据有限的化石材料很难勾勒出远古艺术的面貌。
This paper briefly introduced the state-of-the-art and achievement of steel technology used for USC fossil fired power plants and advanced nuclear power plants in China so far.
本文介绍了迄今我国在超超临界火电机组和百万千瓦核电机组用钢方面的研发进展和取得的成就,并与国外同类技术的研发水平进行了对比。
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