Glancing back, alone, in the softly falling dust motes, I knew.

独自站在轻轻落下的尘埃中，回首过去，我明白了。

youdao

Solving the problem of backmixing of falling dust is helpful to raise the dust collect efficiency of a deduster.

解决多管除尘器由于落尘返混现象，有助于提高除尘器的除尘效率。

youdao

Wind-protection effect, turbulivity and soil moisture are the main factor which determine the falling dust capacity.

防风效能、乱流交换强度、土壤湿度是决定降尘量大小的主要因子。

youdao

He would like to do without museums (except those wonderful provincial examples, like old junk shops, in which nothing is preserved and all is falling to dust).

ECONOMIST: Dust and decay

On another occasion he described how he saw dust from the ceiling falling on a shop assistant stacking sandwiches.

BBC: Marks & Spencer 'warned over asbestos risk'

He said the "tension" between health and safety and profit had caused the "lamentable problems" which had led to ceiling dust possibly containing asbestos falling to the shop floor when it was open.

BBC: Marks & Spencer fined ?1m over asbestos risk