取120个值计算平均数。Take a hundred and twenty values and calculate the mean.把它们相加再除以5就是平均数，明白吗？Add them together, divide by five, and you've got the average. Okay?在新英格兰人们的收入通常比全国平均数低10%.Income in New England is commonly 10 ...
在网络中,凡三个或三个以上的导体联结的一点,称为节点(或称分支点).A Branch point in a network is a point where three or more conductors are joined.异常石墨的形态表现出相互联结的立体网络状.The morphology of abnormal graphites has the three - dimensional interconnection net...