the Forth BridgeˌForth ˈBridge, the a famous metal railway bridge built in 1889 over the River Forth in Scotland, which is considered to be a fine example of 19th century engineering. People sometimes say that a job is ‘like painting the Forth Bridge’ when they mean that it seems to never end, because the metal bridge takes a long time to paint, and when the job is finished it has to start again. 福斯桥〔苏格兰福斯河上一座著名钢桥，建于1889年，被视为19世纪工程设计的典范。人们有时用like painting the Forth Bridge形容某件工作似乎没完没了〕