US claims to a swath of mineral-rich seabed are being challenged by China and Russia because Washington has failed to ratify a treaty that governs access to resources in international waters.
美國對大片礦產豐富的海底的權利主張正受到中國和俄羅斯的挑戰,因爲華盛頓方面並未批准一項規範國際水域資源獲取的條約。
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