鬼斧神工的赵州桥，1300多年了，它还在“月波潋滟金为色，人在苍龙背上行。
O O O O O B-Thing I-Thing I-Thing O B-Time I-Time I-Time I-Time I-Time I-Time I-Time O B-Thing O O O O O O O O O O O B-Person O B-Location I-Location I-Location I-Location O O