dusting/ˈdʌs.tɪŋ/名词打扫;把(家具、书等上面的)灰尘清理掉First she did the dusting.她先清理灰尘。薄薄的一层(粉末、雪等)There was a dusting of snow on the lawn.草坪上有薄薄的一层雪。想跟读,去练习