In Australia, where people spend a lot of time at the beach, the government has realised that it must prevent sharks from swimming near its beaches.
在澳洲，人们会经常去海滩，所以政府意识到应该防止鲨鱼游到海滩附近。
As a result, they've introduced a beach-netting program.
结果，他们引进了沙滩网计划。
Beach-netting, or meshing, involves setting large nets parallel to the shore;
沙滩网或者建网是设置一张与海岸平行的大网。
this means that the nets on New South Wales beaches are set on one day, and then lifted and taken out to sea on the next day.
这意味着新南威尔士的海滩在一天建网，在第二天收网。
When shark-netting first began in 1939, only the Sydney metropolitan beaches were meshed
捕鲨网初次于1939年建立，只在悉尼都市的海滩建网，
these beaches were chosen because beaches near the city are usually the most crowded with swimmers.
因为这些海滩靠近城市，通常是游泳者最多的地方。
Ten years later, in 1949, systematic meshing was extended to include the beaches to the south of Sydney.
10年后，在1949年，建网系统扩展到了悉尼南部的海滩。
As a result of the general success of the program in Sydney, shark-meshing was introduced to the state of Queensland around 1970.
由于该工程在悉尼取得了普遍的成功，捕鲨网在1970年左右被引进到昆士兰州。
The New Zealand authorities also looked at it, but considered meshing uneconomical - as did Tahiti in the Pacific.
新西兰官方也看好它，但是认为建网不赚钱。太平洋的大溪地岛也是同样的看法。