As a typical case, the slow motion of a <e1>swarm</e1> of <e2>particles</e2> in a viscous fluid was studied both theoretically and experimentally.
As a typical case,
As a typical case, the slow motion of a swarm of particles in a viscous fluid was studied both theoretically and experimentally.
<triplet> swarm <subject> particles <object> Member-Collection(e2,e1)