1·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。
2·Let us dip the sheep.
咱们用消毒水洗羊。
3·Give the sheep a dip.
把羊浸泡一下。