pre-leveled预先: in advance; beforehand整平: levelling; equalization; equ ...的: 4次方是 The fourth power of 2 i ...整平的: graded; plane未整平的: ungraded下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:预先整平的,即可在微信中查询翻译