当并列结构 A, B,C 用逗号连接而没有使用并列连词and,则意味着这是不完整列举,只是列举了典型的几个例子。例如本句,后面还可能有 every tree..., every house..., and every...。这种结构多见于文学作品中。初学者不要模仿,知道偶尔有这样的句子即可。另外,如果你看到三项或以上并列的每一项都用and连接,即A and B and C and D, 其效果也是同样的,即不完整列举。例如上述句子可以改为:Every rock looked like a person or animal, and every stream that joined the great river carried its legends, and every hill was heavy with the past.