lecture-hall造句

america is a lecture-hall on a very extensive scale. the rostrum extends in a straight line from boston, through new york and philadelphia to washighton .
美国全国是个极其庞大的讲演厅。讲坛从波士顿起，经过纽约、费城到华盛顿连成一条直线。
It's difficult to find lecture-hall in a sentence. 用lecture-hall造句挺难的