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在課堂上,馬希賢老师看到学生观察显微鏡下細胞时的那种欢欣鼓舞不忍釋手的情景,一方面为孩子們高漲的学習热情而高兴;另方向,又不由得为教具不能滿足教学的要求而焦急。因此,他开始試制显微鏡。他花6万元(旧幣)買来黄銅三脚扩大鏡四个,利用他的零件作制度显微鏡材料;伹怕做不成功,惹别人笑話,于是躲着人做。的确,用手工業的方式制造显微鏡,困难可多着呢。首先是透鏡数目的問题,如果用得少,倍数低;用得多,透进光线弱,生像不明晰;怎样才适宜,只有在很多次的实踐中来确定。
In the class, Master Ma Xixian saw the students’ reluctance to watch out for cells under the microscope. On the one hand, they were delighted with their enthusiasm for learning. On the other hand, they could not help teaching Demand and anxiety. So he started trial production of the microscope. He spent 60,000 yuan (old currency) to buy brass three-leg magnifying glass four, using his parts for the system of microscopy materials; fear of doing unsuccessful, provoke jokes, so dodging people to do. Indeed, the handicraft manufacturing microscope, can be more difficult with it. The first is the problem of the number of lenses, if used less, multiples of low; use more, penetrate the light is weak, raw like unclear; how appropriate, only in a lot of practice to determine.