Colloids are easily put in suspension but settle out of suspension slower than clay-sized material.
胶体微粒可很容易地放入悬浮体中，但从悬浮体中沉降的速度慢于粘土颗粒大小的物质。
The nano-sized material is added to hydraulic-fracture proppant packs or gravel packs on the fly to stabilize formation fines.
上述纳米级材料被添加到水力压裂支撑剂充填层或砾石充填层，以在上述充填层中起稳定地层微粒的作用。
These seeds are actually chondrules: millimeter-sized melted droplets of silicate material that were cooled into spheres of glass and crystal.
这些种子实际上是陨石球粒：冷却后变成玻璃球和水晶球的毫米级熔融状硅酸盐小液滴。
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