Square my shoulders or keep my head down?

收肩还是头压低一点？

My cheeks heat at the realization, and I sit up and square my shoulders in an attempt to look taller and more intimidating.

当我意识到这一点时我的脸颊在发烧，我坐起来，展开肩膀，让自己显得更挺拔更令人生畏。