与class的设计初衷相比，这样就大大延伸了其功能，而且由于应用css样式的属性的广泛使用，所以很难明确应用这种用法。
This is stretching the purpose of class further than it was designed for, and can't be applied very cleanly due to the predominant use of the attribute for applying CSS styling.
背心长度并且延伸到膝盖，上面并有著丰富多样的样式。
The waistcoat also extended to the knee, and was of rich brocades.
背心长度并且延伸到膝盖，上面并有著丰富多样的样式。
The waistcoat also extended to the knee, and was of rich brocades.
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