They were imported to eat algae and other microscopic organisms.

VOA: special.2009.12.15

Since then, since we know about atoms and molecules now, we can rationalize the concepts of thermodynamics using microscopic properties, 62 and if you are going to take 5.62, that's what you'd learn about.

既然我们现在已经知道了原子和分子,的概念），我们可以用,微观属性,来阐释热力学中的概念，如果你会选修5。,-那是你将要学到的。

麻省理工公开课 - 热力学与动力学课程节选

He says the next step is to develop microscopic nano-particles.

VOA: special.2010.03.16

The tiny silicon wires stick up from the base,or substrate, looking something like a microscopic hair brush.

VOA: standard.2010.02.19

The volcano has sent a massive cloud of microscopic ash particles swirling across northern Europe - particles that air specialists say are highly abrasive and could cause aircraft engines to fail.

VOA: standard.2010.04.16