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（单词翻译）
Countries discuss Arctic claims
Vocabulary
temperatures
measures of how hot or cold things are
polar ice caps
common terms for the permanently frozen areas of ice at the North and South Poles
melt
turn from a solid to a liquid state
treasures
precious and valuable things
untapped
unused
reserves
goods or resources kept for future use
staked territorial claims
argued that the areas belong to their countries
expedition
journey, particularly to a place that has not been visited before, or the group of people that take that journey
titanium
a strong, light metal
determination
strong desire to achieve something
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