潜艇在下潜时必须与海军基地保持安全的通信。量子通信技术能够担当如此重任吗？
SUBMARINES must be able to talk securely with remote naval bases while remaining submerged. Could quantum communications allow them to pull off this technically challenging feat?
外阀门则在外部(通常在壳体的进水部位)。在下潜时，油从外部气泡传如内部气泡。
To dive, oil is transferred from the external bladder to the internal one.
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