威胁东北虎种群生存的两个最主要因素是捕猎、生境丧失和破碎化。
The primary causes for the decline of the tiger population were poaching, habitat loss, and habitat fragmentation.
由于人类活动等原因，自然生境在日益丧失和破碎化。
Natural habitat has been increasingly fragmented due to human activity and other reasons.
由于人类活动等原因，自然生境在日益丧失和破碎化。
Natural habitat has been increasingly fragmented due to human activity and other reasons.
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