2. 外语
  3. ______(他们太埋头从事科学研究), not knowing what happened just outside their lab.

______(他们太埋头从事科学研究), not knowing what happened just outside their lab.

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问题 ______(他们太埋头从事科学研究), not knowing what happened just outside their lab.
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答案They were immersed in their scientific research
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大学英语六级

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