但杨锦松也指出了国产科幻片让人失望的另一个原因：文化。
But Yang points to another reason for China's disappointing sci-fi films: culture.
研制以意杨、马尾松混合材为原料生产地板用薄型高密度纤维板。
The development of thin high-density fiberboard which made of mix material Populus and Pinus massonia was studied in the paper.
方法对来自中国不同地域的松杨栅锈菌的5个生理小种11个菌系核糖体its序列和微卫星序列多态性进行了研究。
ITS sequences and ISSR markers based on 11 isolates of 5 RACES collected from different parts in China were studied.
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