“两极的”的英语

对于处在年龄两极的人,细菌性肺炎可能使流行性感冒复杂化.The bacteria pneumonia may complicate influenza at extremes of age.这个电池两极的电动势是3.6伏特.The electromotive force between the two poles of this battery is 3.6 v.为什么地球赤道的周长比两极的周长长那么多?Why is earth...