He was there to witness the crash in population of the common dolphin (Delphinus delphis) from 150 animals in 1996 to almost none in 2007.
他在那里亲眼目睹了海豚群体数量的骤减，海豚的数量从1996年的150头骤减至至2007年的几乎灭绝。
He was there to witness the crash in population of the common dolphin (Delphinus delphis) from 150 animals in 1996 to almost none in 2007.
他在那里亲眼目睹了海豚群体数量的骤减，海豚的数量从1996年的150头骤减至至2007年的几乎灭绝。
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