给以下诗句加上上下文和作者。您的输出应该是包含上下文和作者的完整诗句。


"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep."
这是罗伯特·弗罗斯特（Robert Frost）的诗歌《停留之路》（Stopping by Woods on a Snowy Evening）中的最后四行。这首诗被认为是弗罗斯特最著名的作品之一，它描述了一个在雪天行驶马车的人停留在深林中的情景。这四行表达了主人公欣赏美丽风景的同时，也坚持自己的责任并需要继续前行。全诗如下：

Whose woods these are I think I know,   
His house is in the village though.   
He will not see me stopping here,   
To watch his woods fill up with snow.   

My little horse must think it queer,   
To stop without a farmhouse near,   
Between the woods and frozen lake,   
The darkest evening of the year.   

He gives his harness bells a shake,   
To ask if there is some mistake.   
The only other sound's the sweep,   
Of easy wind and downy flake.   

The woods are lovely, dark and deep,   
But I have promises to keep,   
And miles to go before I sleep,   
And miles to go before I sleep.