Biologists have discovered freshwater eels from North American and European rivers and lakes gathering as far as the middle of the Atlantic ocean during late summer.
生物学家已经发现，夏末时节，北美及欧洲河流湖泊里的淡水鳗鱼会远迁到大西洋中部聚集。
2
Otters have benefited from cleaner rivers in Britain, following a ban on chemicals used in sheep dip in the late 1990s.
英国在20世纪90年代晚期对羊用防腐浸液中的化学物质颁布禁令，河水变清，水獭因而从中受益。
3
In late July an environmental disaster occurred on the Huai river, one of China's seven big rivers.