下三带理论为分析、价底板抗突水能力提供了理论指导。
The" down three zone" theory provides theoretical foundation for security evaluation.
下三带理论为分析、评价底板抗突水能力提供了理论指导。
The "down three zone" theory provides theoretical foundation for security evaluation.
最后，想象一下，你必须离开地球，到一个孤独的星球上呆三天，除了必需品水和食物外，你还要(能)带什么？
Finally, please imagine if you had to spend three days on a lonely planet, away from earth, what would you bring with you other than essentials such as water and food?
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