maintain one's original pure character;as clean [neat] as a (new) pin;be spotlessly clean;free from dust;spotless ;

This fireside is so neatly swept, his pealour clean and his books so well dusted.
壁灯打扫得那么干净,小客厅收拾得那么整洁,书架上又是那么一尘不染.
来源:词典精选例句He threw his cigarette carefully onto the middle of the General's spotless floor.
他特意又把香烟丢在将军那一尘不染的木板地正中.
来源:词典精选例句I slid the drawers out. They were empty too, with not a trace of dust.
我拉出抽屉. 抽屉也是空空的, 一尘不染.
来源:词典精选例句
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