这类病毒可以在宿主体内长期休眠,一旦免疫力下降便重新活跃。Zhè lèi bìngdú kěyǐ zài sùzhǔ tǐnèi chángqī xiūmián, yídàn miǎnyìlì xiàjiàng biàn chóngxīn huóyuè.This type of virus can remain dormant in the host for a long time and become active again once immunity declines.
冬天来了,熊躲进山洞里休眠,一直到春天。Dōngtiān láile, xióng duǒjìn shāndòng lǐ xiūmián, yīzhí dào chūntiān.Winter has come; the bear hides in a cave and hibernates until spring.
这座火山休眠了几百年,随时可能再醒来。Zhè zuò huǒshān xiūmiánle jǐ bǎi nián, suíshí kěnéng zài xǐnglái.This volcano has lay dormant for several hundred years and could wake up again at any time.