1. particles
Particles of dust float in the atmosphere.
It is not enough to show that these two particles are moving at different speed.
Most foreigners will never fully master the use of German modal particles.
How can we define equilibrium for a system of moving particles?
English word "cząsteczki"(particles) occurs in sets:
Fotogrametria i teledetekcjaZawodowy Unit 7Test z angla2. molecules
Behind thermodynamics lie the movements of atoms and molecules following the laws of motion learned in the first volume.
English word "cząsteczki"(molecules) occurs in sets:
Angielski zawodowy słówka