The role of migratory birds in the spread of highly pathogenic avian influenza is not fully understood.
候鸟传播高致病性禽流感的作用尚不完全清楚。
But I think the secret that the migratory bird migrates is perhaps distributed the wetland on the earth.
但我觉得候鸟迁徙的奥秘也许是因为地球上分布着湿地。
Population composition and migratory distribution of cuttlefish in the Huanghe Estuary and the Laizhou Gulf
黄河口及莱州湾海域曼氏无针乌贼得群体组成和洄游分布
The total discards by those highly migratory species fisheries is estimated to be about700,000 tons annually.
这些高度洄游种渔业总弃鱼量每年估计约为70万吨。
Convention on the Conservation and Management of Highly Migratory Fish Stocks in the Western and Central Pacific Ocean
养护和管理高洄游鱼类种群公约
Scientists do researches on the migrating rules of migratory birds according to the circular marks fixed on bird legs.
科学家根据安装在鸟腿上的环志来研究候鸟的迁徙规律。
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