shí / yàn / shì / qīng / jié / hòu / gōng / zuò / rén / yuán / zài / cì / jiǎn / cè / shè / bèi / biǎo / miàn / shì / fǒu / yǒu / cán / yú / zhān / rǎn实验室清洁后,工作人员再次检测设备表面是否有残余沾染。After cleaning the laboratory, the staff tested the equipment surfaces again for residual contamination.