Rules and Regulations for the Construction and Classification of Sea Going Steel Ships
钢质海船入级与建造规范
Rules for the Construction and Equipment of Sea Going Ships Relating to Pollution Prevention
海船防污染结构与设备规范
Now they're saying the sea ice in the Arctic, the summertime extent is going to be gone in the next four to 8 years.
而现在，他们认为极地冰川的寿命 只剩下4到10年了
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