Communication (from Latin commūnicāre, meaning "to share") is the act of conveying intended meanings from one entity or group to another through the use of mutually understood signs and semiotic rules.
Scientists are studying how toxic chemicals are naturally degraded in polluted waters with a view to developing cost-effective methods for cleaning up contaminated sites.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
