indentation/ˌɪn.denˈteɪ.ʃən/名词物体表面的洞（或记号）The heels of her shoes had left indentations in the mud.她的鞋跟把泥地踩得坑坑洼洼。（书写时的）缩排，行首空格；使用行首空格想跟读，去练习
