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abbr. submarine fog bell 潜水雾钟
🗣️ 情景例句
These files are highly confidential, please store them properly.
这些文件是高度机密的，请妥善保存。
How far?
多远？
Later, the Crystal Palace was moved to South London.
后来，“水晶宫”被移到了伦敦南部。