dusting
noun [ U ] uk/ˈdʌs.tɪŋ/ us/ˈdʌs.tɪŋ/
(CLEANING)
打扫;把（家具、书等上面的）灰尘清理掉
the activity of removing dust from furniture, books, etc.
First she did the dusting. 她先清理灰尘。
(THIN LAYER)
薄薄的一层（粉末、雪等）
a thin layer of powder, snow, etc.
There was a dusting of snow on the lawn. 草坪上有薄薄的一层雪。