prep是什么词性（prep表达方式）

counterbalance ['kaunt?, b?l(?)ns] v. 抵消，平衡

hesitant ['hezit(?)nt] adj. 犹豫的

vague [veig] adj. 模糊的

subtle adj. 微妙的

intrude [in'tru: d] v. 闯入

encounter [in'kaunt?; en-] v. 遭遇

advantageous [?dv?n'teid??s] adj. 有利的

mention ['men?(?)n] v. 提及

slightly ['slaitli] adv. 轻微地

concerning [k?n's?: ni?] prep. 关于