Some cities have started cutting down ginkgoes , while others are standing by their trees and even planting more of them .

有些城市已经开始砍除银杏树，不过也有些城市还是喜欢，甚至愈种愈多。

Female ginkgoes produce the troublesome seeds , which are covered in a fleshy coating that contains butyric acid , also found in rancid butter .

雌性的银杏树会结果实，造成困扰；果实外壳厚实，含有丁酸，这种成分也会出现在酸腐的黄油中。