Side rail can be added.

可附加侧边护栏。

Move the pointer over the outer edge of the side rail.

将指针移到顶部轨道的上边缘。

To the side rail of the metal bed I fastened a pair of handcuffs.

手帕蒙眼睛，护目镜固定，铁床的边栏上挂着一副手铐。

Side rail type frame is a major constructional form of motor vehicle frames.

边梁式车架是汽车车架的主要结构型式。

They can also easily add and remove friends, or chat with them, on the left-side rail.

他们还可以使用左侧的工具栏轻松地添加和删除朋友，或者与他们聊天。