第二，美国和西方同盟国在战略物质上有重要利益，像矿物质和矿石，这些需要从不发达国家，像是菲律宾进口。
Second, the US and its western Allies have a vital interest in strategic materials, like mineral and ore, which have to be imported from less-developed countries like the Philippines.
现在处于争论关头的不仅仅是渔业，碳氢和矿物资源，一旦北极的冰川融化，曾经一片沉寂的北极地区可能成为通往东亚的战略要道。
At stake are not just fish, hydrocarbons and minerals: melting ice means that the Arctic, once largely a dead end, may become a strategic route to East Asia.
本文概述了过去海洋矿物勘探，并与目前的战略进行了比较。
A brief summary of past Marine mineral exploration strategies is given and compared to present strategies.
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