But getting inside and seeing Big Ben, the sonorous main bell that gives its name to the whole contraption, isn't easy. 但要想進入大本鐘內，去看一看給這座巧奪天工的建筑享譽全球的名字的那個響聲洪亮的主鐘，可不是件容易的事。
The danube is one of the principal river of europe. 多瑙河是歐洲的主要河流之一。
Draw a map of Africa and show the courses of the main rivers. 畫一幅非洲地圖，并且標明主要河流的路線。
The sand and gravel in the Yangtze river is good building and filling materials. 摘要長江中下游干流河道內的砂石是較好的建筑和填筑材料。
Gezhouba Water Control Project on the Yangtze River is the first large-scale construction of water conservancy projects. 葛洲壩水利樞紐工程是長江干流上興建的第一座大型水利工程。
The main girders support I-section transverse ribs. 主梁支承著工字梁的橫向肋。
They tried to streamline the main panel of TV. 他們盡力簡化了電視機的主板。
