1
- lasting or existing for a long or apparently infinite time; enduring长期的, 永久的; 持久的：
his perennial distrust of the media.
他对媒体的长期不信任。
1.1
- (of a plant) living for several years（植物）多年生的：
cow parsley is perennial.
峨参是多年生的。比较ANNUAL, BIENNIAL.
1.2
- (especially of a problem or difficult situation) continually occurring（尤指问题或困难的情形）反复的, 一再的：
perennial manifestations of urban crisis.
一再出现的都市危机。
1.3
- attrib.(of a person) apparently permanently engaged in a specified role or way of life（人）定型的, 不变的：
he's a perennial student.
他永远是一个学生。
1.4
- (of a stream or spring) flowing throughout the year（溪流, 泉水）常年的, 终年的。
- a perennial plant多年生植物。
派生词
perennially
adverb词源
mid 17th cent. （in the sense 'remaining leafy throughout the year, evergreen'）： from Latin perennis 'lasting the year through' +-IAL.