But that's just a very small facet of a much greater problem of invasions of species worldwide, all through the ecosystems, and you know, the Earth itself -- CA: Partly caused by us, inadvertently.
侵略という より深刻な問題の ひとつの小さな側面に過ぎません CA： 故意ではなくともその一部は人間が引き起こしています