clean coal煤: coal的: 4次方是 The fourth power of 2 i ...净化: purify; purge; defecate; cle ...环境的净化: depollution of environment浆的净化: pulcleanina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:煤的净化,即可在微信中查询翻译