重点词汇
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全球变暖
global warming
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原因
reason; cause; source; rationale; basis; occasion; motive; motivation; sense; meaning; anatomy; recipe; explanation; causation; causal
Five reason for global warming
全球变暖
global warming
原因
reason; cause; source; rationale; basis; occasion; motive; motivation; sense; meaning; anatomy; recipe; explanation; causation; causal