USDA's top bee scientist, Jeff Pettis, who is coordinating the detective work on this die-off, has more suspected causes than time, people and money to look into them.
美国农业部的首席蜜蜂科学家JeffPettis负责协调调查这次蜜蜂死亡，他有更多的人力和财力来调查，他认为除了时间外还有很多可怀疑的原因。
USDA's top bee scientist, Jeff Pettis, who is coordinating the detective work on this die-off, has more suspected causes than time, people and money to look into them.
美国农业部的首席蜜蜂科学家JeffPettis负责协调调查这次蜜蜂死亡，他有更多的人力和财力来调查，他认为除了时间外还有很多可怀疑的原因。
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