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来源:雅诚德英语网
Perhaps this constant moving is stressful for the bees and so depresses their immune systems.
也许持续的迁移对蜜蜂造成压力,抑制了其免疫系统。
Perhaps this constant moving is stressful for the bees and so depresses their immune systems.
也许持续的迁移对蜜蜂造成压力,抑制了其免疫系统。