《西厢记》

晓来谁染霜林醉？
总是离人泪。

- 王实甫

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At dawn what dyes the frosted woods the flush of drunkenness?
It will ever be the tears of separated lovers.

- Wang Shifu (Source)

Break down:
At dawn (晓来) what dyes (谁染) the frosted woods (霜林) the flush of drunkenness (醉)?
It will ever be (总是) the tears of separated lovers (离人泪).