名词解释：跨海大桥指的是横跨海峡，海湾等海上的桥梁，这类桥梁的跨度一般都比较长。短则几千米，长则数十千米，所以对技术的要求较高，是顶尖桥梁技术的体现。你知道怎么用英语表达吗?
On Friday, the world's longest cable-stayed bridge opened to traffic.
Jiashao Bridge is the second cross-sea bridge across Hangzhou Bay in China. The bridge is a massive eight-lane structure that spans approximately 6.28 miles.
Shanghai, located to the northeast of Jiaxing, would normally be a three hour trip for drivers coming from Shaoxing. The commute is now halved with the opening of the Jiashao Bridge. Bridge-crossers will be charged a toll of 40 yuan for the trip.
上周五，世界上最长的斜拉桥正式开放通车了。
嘉绍大桥是横跨中国杭州湾的第二座跨海大桥。这座大桥外观浩大，拥有8根车道，桥梁全长约有6.28英里。
上海位于嘉兴的东北。以前，从绍兴开车到上海要花费三个小时。而随着嘉绍大桥的开放通车，路程时间将缩短一半。嘉绍大桥的通行费为40元。
【讲解】
文中的cross-sea bridge就是“跨海大桥”的意思。第一段中的cable-stayed bridge是“斜拉桥”、“索拉桥”的意思。常见的桥梁建筑样式还有：suspension bridge 悬索桥;arch bridge 拱桥;pontoon bridge 浮桥;cantilever bridge 悬臂桥;draw bridge 吊桥;bridge to nowhere 断桥。
文中还有一些有用的表达法，如Hangzhou Bay 杭州湾;eight-lane 有8根车道的;commute 两地往返、上下班通勤;toll 路费、通行费。