那位黑人少年极为忧伤，因为他父亲在工厂的一起严重意外事故中丧生了。
That black lad was very sad because his dad had died in a bad accident in the factory.
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他深深地沉浸在忧伤中，因为他的女友离他而去了。
He was deep in gloom because his girlfriend had gone away.
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