Cov ntaub ntawv yas thiab hlau feem ntau yog siv rau hauv kev tsim cov tawb tsim rau cov dev me lossis tsiaj cov hnab yas yog compact, hnav, thiab yooj yim los ntxuav, ua rau lawv xaiv conservative Yuav ua li cas, lawv drawback lies nyob rau hauv lawv qhov tsis zoo rau hnav thiab tsim kua muag, nrog ib tug nro kom tawg
