The two stresses can then be added algebraically to obtain the resultant.然后將兩種應(yīng)力代數(shù)相加就得到合應(yīng)力.It is much easier to indicate how to find the mean by expressing the procedure algebraically.用代數(shù)的方法來(lái)表現(xiàn)這個(gè)過(guò)程,就更容易說(shuō)明平均數(shù)是如何求得的.First ...