重点词汇
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陆地
land; earth; continent; mainland; landmass; dry land; terra firma; terrestrial; earthbound; land-based
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疆界
border; boundary; frontier; limit; demarcation line; territorial line
land boundary
陆地
land; earth; continent; mainland; landmass; dry land; terra firma; terrestrial; earthbound; land-based
疆界
border; boundary; frontier; limit; demarcation line; territorial line