A new scientific study has revealed that there are an average of 9000 different species of microbes in house dust.
一项新的科学研究发现家具灰尘中含9000种细菌。
House dust
原声例句
BBC 听力 2015年8月合集
VOA Standard 2015年10月合集
Even more disagreeable is the fact that, along with ordinary house dust, we breathe in their feces, which contains enzymes called proteases.
更让人难以接受的是，同普通家庭灰尘一道，我们吸入了“尘螨”的粪便，它的粪便中含有蛋白酶。
Veritasium真理元素
The goal of every standard is to quantify something about the world, something important that's usually pretty hard to measure, (vacuuming noise) like house dust.
每个标准的目标都是量化世界上的某些事物，一些通常很难测量的重要事物，（消除噪音）， 例如房屋灰尘。
中文百科
灰尘 Dust
（重定向自House dust）
灰尘是大气中一种固态悬浮物，常态存在于空气之中，易伴随风的吹拂而四散至各处，包括家中的每一个角落。其粒径大小有所差异，不一定能以肉眼见到。
灰尘颗粒的直径通常小于500微米。小于10微米的悬浮粒子（PM10），即被认定有害于人体；小于2.5微米的细颗粒物（PM2.5），更可穿透肺泡直达血液。
英语百科
Dust 灰尘
（重定向自House dust）
Dust consists of particles in the atmosphere that come from various sources such as soil, dust lifted by weather (an aeolian process), volcanic eruptions, and pollution. Dust in homes, offices, and other human environments contains small amounts of plant pollen, human and animal hairs, textile fibers, paper fibers, minerals from outdoor soil, human skin cells, burnt meteorite particles, and many other materials which may be found in the local environment.