as they have done for at least 1,000 years. 一千年以来一直如此
Mother comes to the rescue and demonstrates what must be done. 妈妈来救它 告诉它应该怎么做
Climbing onto it to incubate has to be done with care. 不过爬上去孵蛋需要格外小心
After mating, the adults lay their eggs and then their job is done. 成蝉在交配完并产卵后,它们的工作也完成了
so the transfer must be done quickly 所以交接过程必须迅速完成