求翻译：从运营条件上看，悬臂梁桥和简支梁桥均不甚理想，简支梁桥在梁与梁衔接处以及悬臂梁桥在悬臂端与挂梁衔接处的挠曲线都会发生不利于行车的折点，并且伸缩装置需经常更换。是什么意思？

Is not conducive to driving conditions for the operation point of view, the cantilever bridge and simply supported beam bridge are less than ideal, simply supported beam bridge beam and the beam convergence at the cantilever bridge cantilever beam connection between the deflection curve will occur b

From an operational conditions, Outrigger bridge and charpy bridge are not ideal%