origins名词事情的开始。The origins of pizza can be traced back to ancient Greece, where flatbreads were topped with oil, herbs, and cheese.披萨的起源可以追溯到古希腊,那里的扁饼上撒满了油、草药和奶酪。河流的源头、信息、商品等。平面直角坐标系交点。想跟读,去练习