????? ?? ?????????? ? ??. ????? ??????? ? ???????????: a mass or overall body of models or components fairly loosely related to one another Froth is really an combination of small bubbles.?? ?? ??? ???????, ?? ????????? ?? ??? ????????? ?? ?????? ??????, ???????????? ?? ?? ?? ???????? ?? ???????? ? ???? ??? ????? ? ?????????? ? ?????????????????.??