They must use research to inform themselves of the missing parts of the story.
他们必须通过调查研究，来使自己了解到被遗漏的那部分情况。
They must use research to inform themselves of the missing parts of the story.
他们应该通过研究找出故事中缺少的部分。
They must use research to inform themselves of the missing parts of the story.
他们应该通过研究找出故事中缺少的部分。
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