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1. 粉尘：fine clay 幼黏土 | fine dust 粉尘 | fine gravel 细砾
2. 细粉尘：fine concrete 细骨料混凝土 | fine dust 细粉尘 | fine grading 细级配
1. Residents in the state's largest city were spared from falling ash, though fine gray dust fell Monday morning on small communities north of Anchorage.