A:This is the Beihai Park,or the North Sea Park. 这是北海公园. B:The North Sea Park? 北海公园吗? A:Yes."Bei" in Mandarin means north, 普通话"Bei"意思就是 north and"hai" means sea. "hai"意思是sea. But of course this is just a lake. 当然喽,这只不过是个湖. B:And a very beautiful lake. 是个非常美丽的湖. A:Well,yes.In fact this is part of a big lake. See the bridge over there? 其实它是个大湖的一部分. 看见那座桥了吗? B:Yes?With heavy traffic on it? 看见了,是那座车辆很多的桥吗? A:That's right. 是的.