影响至深难忘恩师北京林业大学博士生导师罗菊春教授在我来到汪老身旁向他老人家祝贺九十大寿之际，脑子里一时浮现出４０多年前他站在讲台上的身影。汪振儒教授给我们讲的是植物生理学，讲台上摆着一大摞中外文参考书，但没有统编的教材。每堂课他只讲一个主题，从原理讲... Influential to the Unforgettable Mentor Professor Luo Juchun, a doctoral supervisor at Beijing Forestry University, came to Wang’s body to congratulate his elderly on the occasion of his 90th birthday. His mind suddenly appeared on the podium more than 40 years ago. Professor Wang Zhenru told us that plant physiology, podium is placed in a large pile of Chinese and foreign reference books, but no unified textbook. He only speaks one topic per class, speaking from the principle ...