先把要观察的叶片切成０．５～１ｃｍ宽的细条，把细条放在光滑平整的木块上。取三片新的双面刀片，在玻璃上刀口对齐，然后将中间的提高２～３ｍｍ，使两边的刀片间有一条细缝，并可根据叶的厚度随时调整细缝的高低。用右手捏紧刀片中央，捏的位置在离刀口２～３ｍｍ处即... First cut the leaves to be observed into thin strips of 0.5 to 1 cm wide, and place the thin strips on smooth, flat wooden blocks. Take three new double-sided blades, align the edges on the glass, then increase the middle of the blade by 2 to 3mm so that the blades on both sides have a fine slit, and the height of the slit can be adjusted at any time according to the thickness of the leaves. Use the right hand to pinch the center of the blade, pinch the position 2~3mm away from the blade