电鳗很长，通常为灰褐色。
这种方法对于那些中性色(译者注：非彩色)的鞋子最有效果，比如黑色、深蓝、灰色、灰褐色、棕褐色或者棕色等。
This approach works most successfully with shoes that are neutral colors, such as black, navy, gray, taupe, tan, or brown.
我希望我会刷漆，但是我知道自己已经习惯了公寓的灰褐色。
I wished I could paint, but I learned to live with apartment beige.
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