The question whether the secondary moment is changing while loading is answered.It shows that the secondary moment is unaltered when increment method is adopted to study the beams.是什么意思_The question whether the secondary moment is changing while loading is answered.It shows that the secondary moment is unaltered when increment method is adopted to study the beams.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句