灰塵

In a sentence

• 桌子上积满了灰塵，需要清理一下。

  The table is covered with dust and needs cleaning.

  In this sentence, '灰塵' refers to physical dust that has accumulated on a surface.

• 空气中弥漫着灰塵，让人感觉呼吸不畅。

  Dust fills the air, making breathing feel difficult.

  Here, '灰塵' describes dust particles suspended in the air causing discomfort.

• 书柜四周没有一丝灰塵，显然是经常打扫的。

  There is not a speck of dust around the bookshelf, indicating it is cleaned frequently.

  In this example, '灰塵' emphasizes the absence of dust, which signifies tidiness and regular cleaning.