重点词汇
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煤炭
coal
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产区
production area; producing region; manufacturing district; industrial zone
中英释义：
煤炭产区
时间: 2026-01-22 10:29:41
coal-producing area; sources of coal
中英释义：
coal-producing area; sources of coal
煤炭
coal
产区
production area; producing region; manufacturing district; industrial zone