conceal; cover up; hide 可以～一时，但不能永远～。You can conceal the truth for some time but not forever./毫不～hold back nothing; have nothing to hide(or conceal)/～错误conceal (or cover up)one’s mistakes/～事实withhold (or conceal,hide,hold back) the truth; nondisclosure /～真相suppress (or withhold) the truth