unprecedented difficulties and pressure空前: unprecedented; unparalleled巨大: huge; tremendous; enormous; ...的: 4次方是 The fourth power of 2 i ...困难: difficulty; difficult; hard; ...和: mix; blend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:空前巨大的困难和压力,即可在微信中查询翻译