有如流水般的时光，使人对过去曾经历过的一些事物，会逐渐淡漠以至遗忘，但在人生转折关头来临的境遇，却能弥久而常新的永记心头。在我后半生治学的道路上，就有这样的两位前辈，使我受其教诲获益良多。这一仰高山慕景行的心境，一直激励着我，使我方能自强不息。我从事农史 Like a stream of water, people will gradually indifferent to forget things they have experienced in the past. However, they will never forget the moment when the turning point of life will come. On the way of my later life, there are such two predecessors, who have benefited greatly from their teachings. The state of mind of this high mountain and admiring landscape has always inspired me so that I can strive for self-improvement. I am engaged in agricultural history