a.

1. 永久的；长期的
   They hoped to live in perpetual happiness.

   他们希望生活在永久幸福之中。

2. 【口】无休止的；连续不断的
   I'm tired of your perpetual nagging.

   我对你无休止的唠叨厌烦了。

3. 无限期的；终身的
   He was perpetual president of the country.

   他是该国的终身总统。

4. 四季开花的
   That is a hybrid perpetual rose.

   那是一株杂交的四季开花的蔷薇。

n.

1. 【植】四季开花的蔷薇；多年生植物

adj.

1. never ending or changing.
   ▸denoting or having a position or trophy held for life rather than a limited period.
   ▸(of an investment) having no fixed maturity date.
2. occurring repeatedly.
3. (of a plant) blooming or fruiting several times in one season.