English to Arabic Science Science (general)

Nucleation and Condensation
As the vapour plume propagates outward and starts to cool, the cooler front of the plume cloud allows aerosol particles to form.
The characteristic times for particle formation are typically on the order of nanoseconds (10-9 sec), which is much shorter than the duration time of the cloud.
The much shorter time scale for the particle formation ensures that the vapour will be transformed into particles.
Condensation of the vaporized atoms is the mechanism for the generation of nanosized particles.