显微镜下可以看到水中有很多微小的颗粒。
Under the microscope, you can see many tiny ___particles in the water.
灰尘实际上是由微小的颗粒组成的。
Dust is actually made up of tiny ___particles.
在汉语中,'了'和'的'这样的虚词用于表达不同的语法功能。
In Chinese, ___particles like 'le' and 'de' serve different grammatical functions.