【聚集速度】是指在沉淀形成过程中，溶液中的离子以较大的速度互相结合成小晶核，这种作用速度称为聚集速度。
通过测量因纳斯卡板块挤压海岸发生碰撞造成的地面的缓慢上升与下降，他们能够估算压力的实际聚集速度。
By measuring the slow rising and falling of the ground as the inexorable collision of the Nazca plate squeezed the coast, they could calculate how fast strain was actually building.
它们被聚集起来投入实验，此时速度大约是5米每秒——仅为空气中分子自由碰撞速度的百分之一。
They are gathered up and injected into the quantum experiment at speeds of around five meters per second - just a hundredth the speed of the molecules flying around in the air.
如果海洋物种吸收放射颗粒的速度快于排出，放射性物质就能够聚集起来并影响食物链上层的大型动物。
If Marine species take up these radioactive particles faster than they break them down, the radiation can concentrate and affect larger animals that eat them.
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