And for another 2000 years Chinese dynasties built walls. In the end a whole network of walls spread across the northern tier of the country.
在此后的2000年里，中国各朝代继续修建城墙，最终形成了一条完整的城墙网络，横亘在中国北部。
La Nina tends to steer winter storms over the northern states, and El Nino more typically brings storms across the southern tier of the nation.
“拉尼娜”在北部各州会产生冬季风暴，“厄尔尼诺”则倾向于产生能够横跨国家南部各层的风暴。
La Nina tends to steer winter storms over the northern states, and El Nino more typically brings storms across the southern tier of the nation.
“拉尼娜”在北部各州会产生冬季风暴，“厄尔尼诺”则倾向于产生能够横跨国家南部各层的风暴。
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