例句與造句

1. 4 . because there are sub - elements in a member with the introduction of inner joints , when tile spatial stifmess matrix of main joints of a member is made , there are some cases of solving the double nonlinear equations , negative stifmesses , and singular stiffness matrices in process of iterating
   4 、由于引入了內(nèi)結(jié)點(diǎn)，構(gòu)件存在子單元，在形成主節(jié)點(diǎn)的構(gòu)件空間單元剛度矩陣時，存在雙重非線性方程求解，迭代過程中負(fù)剛度和剛度矩陣奇異問題。
2. It's difficult to find singular stiffness matrix in a sentence. 用singular stiffness matrix造句挺難的