微粒的英文：
speck
particle

The light beam is scattered by small particles in the moving fluid.
光束被流动流体中的微粒所散射。

A subatomic particle.
次原子亚原子微粒

radioactive fallout
放射性微粒回降

The sandlike granular material of urinary calculi.
结石泌尿结石的沙状微粒物质

The nanometre corpuscle or nanometre material has its own special properties and new rules.
纳米微粒及纳米材料具有独特的性质和新的规律。

A cluster of droplets separated out of a lyophilic colloid.
凝集作用从亲液胶体中分离出的一串微粒

Starch is unique among carbohydrates because it occurs naturally as discrete particles (granules).
淀粉在碳水化合物中是独一无二的,因为它作为个别微粒自然产生。

Radioactive fall-out( dust carried by winds around the earth after a nuclear explosion,etc)
放射性微粒回降(核爆炸等之后放射性尘埃随风散落到地面)

A discrete particle,such as a photon or an electron.
微粒有某种特性的微粒，如光子或电子

An atom is the smallest indivisible particle of matter.
原子是最小的不可分的物质微粒。

to flip a speck of dust off
把一点灰尘掸掉

The sky is clear and bright without a speck of cloud.
天空晴朗，一点云彩也没有。

The car accelerated away and was soon just a speck on the horizon.

I have definitely seen this floating speck before.
我之前肯定是见过这个漂浮物。

But the actual information in it weighs less than a speck of dust.
但网络包含的实际信息的重量却不及一粒灰尘。

swarm of particles
粒子群集

Magnetic particle testing/magnetic particle examination
磁粉检测

The particles will be deposited on horizontal surface.
这些粒子将沉淀在水平面上。

With methyl methacrylate the particle diameter increases linearly with conversion indicating particle aggregation
采用甲基丙烯酸甲酯时，粒子直径随转化率呈直线增大，这就表明粒子发生了聚集。

One case is that of tiny dust particles or colloidal particles suspended in a fluid
一种就是微小的灰尘粒子或悬浮在液体中的胶粒。