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看宽叶片宽度越宽越好,10厘米以上为名品;8～9厘米为上品;6～7厘米是中品;5厘米以下为次品。看长即叶片长宽比。4∶1为名品;5∶1为上品;7∶1为中品;8∶1为次品。
To see the wide blade width wider the better, 10 centimeters above the famous; 8 to 9 cm for the top grade; 6 to 7 cm is the product; 5 cm below the defective. Look long blade aspect ratio. 4: 1 is famous; 5: 1 is top grade; 7: 1 is middle quality; 8: 1 is defective.