背部
the rear surface of the human body from the shoulders to the hips
背面, 后面
the part or side of something that is opposite the front
向后, 往回
in the opposite direction to the one that someone or something is facing or traveling
回来, 回原处
to or at the place where someone or something was before
回溯, 以前
in or into the past
后面的, 背面的
situated at the back
后退, 支持
move backward
支持, 资助
give financial, material, or moral support to