Let us move on and step out boldly, though it be into the night, and we can scarcely see the way.
虽然夜已深了，前面的途径颇难分辨，我们还该大胆举步前进。
It will also work on step and appstep elements, even though it doesn't know what they are specifically, because the class attribute tells the template what they are generally.
它可用于step和appstep元素，即使不知道它们的具体类型，因为class属性告诉了模板它们的一般类型。
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