That's why many scientists believe it's important to keep challenging your brain to learn new things and make new connections — it helps keep the brain active over the course of a lifetime.

所以许多科学家们认为，为锻炼我们的脑子而不断地学新鲜事、交新朋友是很重要的，这有助于脑子在一生中都能保持活跃。

youdao

AMS-02 is expected to remain active for the entire lifetime of the ISS and will not return to Earth.

AMS - 02将终身停留在国际空间站，不再返回地球。

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However, one in 10 will become sick with active TB in his or her lifetime due primarily to a weakened immune system.

但是，其中十分之一的人在一生中某一天会成为活动性结核病患者，主要原因是其免疫力减弱。

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Duqu has an active lifetime of only about 36 days, but this is probably to limit its discovery.

FORBES: Son of Stuxnet

Featuring electronic paper display, absolutely unique battery lifetime (up to 60 hours active) and patented USB hinge design.

ENGADGET: Russian YotaPhone promises dual 4.3-inch LCD and E Ink displays in Q3 of next year

Alternatively, active-adult communities don't require the upfront payments to cover a lifetime of care.

WSJ: Luxury Retirement Living: A New Senior Moment