I sat in a padded chair and studied the layout.

我坐在软垫椅子上研究布局。

Immediately he felt something hard press into the base of his spine, right into the cleft between his two buttocks on the padded chair.

紧接着，他感觉到有什么硬东西压在了他的脊椎根部，就在他坐在软垫椅子上的两个臀部之间的裂缝里。