perennial
名词复数：perennials
词形变化：
同义词：
perpetual | constant | regular | continuous | steady | recurrent | returning | persistent | lasting | continuing | permanent | enduring | unfailing | annual | ceaseless | changeless | classic | repeated |
反义词：
词义辨析：
同义:
a.继续的; 永久的
continuous
constant
perpetual
steady
regular
同义参见:
changeless
classic
ceaseless
annual
反义:
a.四季不断的; 多年生的
annual