dust remover; 除尘器
not stained with a particle of dust; spotless 一尘不染
this mortal world 尘俗
follow in other people's footsteps; trail along behind others 步人后尘
Chen Duo 尘铎
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)