在今天结束之前，我想我要提到一个生物学事件，它是冬春过渡的一部分，如果你有耐心的话，你可以去外面观察。
Before we close today, I thought I'd mention a biological event that's a part of the transition from winter to spring, something you can go outside and watch if you have some patience.
我国西部是油菜的原产地，作物生长期内的气候特点，同春油菜的生物学特性恰相适应。
Western part of China is original place of rapeseed, where climatic character during the crop growth period is corresponding to the rapeseed biological characters.
而郑鹤春、郑鹤声两兄弟合著的《中国文献学概要》则是当代中国第一次使用“文献学”的名称来概括这门学科的。
Using "philology"in modern china to sum up a subject for the first time was brothers, zheng Hesheng and zheng Hechun, who co-written a work, outline of Chinese philology.
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