1.b> 1) ;
2) ( / i>); perennial supply of water ;
2.b> 1) , , ; perennial problem [concern] / []; perennial youth ; perennial hunger ;
2) , , / ; the perennial conflict between government and opposition / ;
3) ; perennial efforts ;
3.b> ; as perennial as "Uncle Tom's Cabin" , " ";
4.b> ( i>); perennial herbs .