我身体一侧有剧烈的疼痛。

I have a sharp pain in my ___side.

受伤的猫蜷缩着侧躺。

The injured cat curled up on its ___side.

他把包裹紧紧贴在身侧以隐藏它。

He pressed the package tightly against his ___side to conceal it.