Alf did this for over two years, and his fellow dustmen kept his secret.两年多以来,艾尔弗一直这样, 他的同事也为他保守秘密.The dustmen were busy clearing up the snow on the road.清洁工正在清除路上的积雪.Please distribute these brooms to the new dustmen.请你把...

n.清洁工( dustman的名词复数 )...

dustmen的音标：...