求翻译：从3月3日开始，洞庭湖连续发现江豚死亡事件，截至4月15日，已经有12头江豚死亡，其中有9头集中在一个星期内被发现。不仅是洞庭湖，鄱阳湖近期也发现江豚死亡，尸体解剖发现，这些死亡的江豚大多有一个共同特点：消化系统里没有任何食物残留。是什么意思？

March 3, Dongting Lake and continued to be found finless porpoise deaths, as of April 15, 12 finless porpoise deaths, of which 9 are concentrated within a week was found. Not only is the Dongting Lake, Poyang Lake recently found a finless porpoise death, an autopsy found that the finless porpoise mo

From beginning on March 3, Dong Ting lake, and river dolphins found consecutive deaths, as at 15 April 12, there have already been killed and finless porpoise, which has 9 heads in a week was found in. Not only is Dong Ting Lake Poyang Lake, and river dolphins are also found near death, an autopsy f

From March 3, the continuous event finless porpoises were found dead in Dongting Lake, as of April 15, there have been 12 head of finless porpoise deaths, of which 9 are found concentrated in one week. Not only is Lake Dongting, Poyang Lake finless porpoises were found dead recently, the autopsy fou