例句與造句

1. Vibration equations of contact wires were used to derive the formulae for calculation of mean and standard deviations of stresses
   摘要根據(jù)接觸懸掛系統(tǒng)中的接觸線振動方程，推導(dǎo)了接觸線應(yīng)力的均值和方差的計算公式。
2. It's difficult to find deviation of stress in a sentence. 用deviation of stress造句挺難的