-maintainone'soriginalpurecharacter;asclean[neat]asa(new)pin;bespotlesslyclean;freefromdust;maintainpersonalintegrity(duringchaotictimes);notbecontaminatedbytheworld;nottobestained[soiled]with[by]aparticle[speck]ofdust;remainuncontaminated;spotless;Thereisnotaspeckofdust.:
Theapparatusisspotlesslyclean.仪器上一尘不染。