The principle of superpostion is often used as the main postulate, from whic h the reciprocal theorems and hence the symmetry of the flexibility matrices are proven.是什么意思_The principle of superpostion is often used as the main postulate, from whic h the reciprocal theorems and hence the symmetry of the flexibility matrices are proven.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句