1. First, they erect four wooden pillars painted with fern leaf veins. 首先，在平坦的场地上树起四根绘有蕨叶纹的木牌柱。
2. Look at a fern leaf, a cauliflower, and a magnified snowflake to see this distribution of sizes graphically. 看看蕨叶、菜花和放大的雪花，我们能从图形上看到尺寸的分布。
3. And builds some mathematics models. Using these models and methods, some nature scenes are simulated successfully, for example: terrain, tree, leaf and fern etc. 利用以上方法，建立一些描述具体自然对象的数学模型，成功地模拟了山峦、树木、树叶和蕨类等自然景物。
4. The lotus leaf fern Adiantum growth conditions of the study also stay in more qualitative analysis. 对于荷叶铁线蕨生长条件的研究也多停留在定性分析上。
