摘要
当产卵的鱼群在荷兰乌得勒支的运河中穿行时,它们经常会被水闸挡住--尤其是在春季,水闸很少打开。不过,该市居民现在正在使用网上的“鱼门铃”系统帮助鱼儿通过水闸。
1Tasked with helping ensure Utrechts canals remain full of life and convincing every⁃one it wasnt an April FoolsDay joke,two ecologists in the Dutch city have invented the worlds first“fish doorbell”.
