However, sporadically, in time or space, some species may grow rapidly to damaging numbers, developing outbreaks which may persist for a variable length of time before subsiding.

但是，在某些时间或空间，一些物种会迅速生长到足以造成危害的数量，导致病虫害爆发，持续时间不定。

youdao

However, sporadically, in time or space, some species may grow rapidly to damaging numbers, developing outbreaks which may persist for a variable length of time before subsiding.

但是，在某些时间或空间，一些物种会迅速生长到足以造成危害的数量，导致病虫害爆发，持续时间不定。

youdao