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。
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。
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。
Haroun Tazieff, the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world.
波兰科学家哈罗恩·塔捷耶夫花了毕生的精力来研究世界各地的活火山和深洞。
The active component can be well adsorbed on the support(D3520), on which the lifetime of the catalyst is prolonged.
D3520载体对活性组份具有良好的吸附性能，延长了催化剂的使用寿命。
This power supply employs low voltage starting for the krypton lamp, which has an active realistic significance for increasing the lifetime of the krypton lamp.
该电源对氪灯实行合理的低压起动，对延长氪灯使用寿命有积极的现实意义。
This power supply employs low voltage starting for the krypton lamp, which has an active realistic significance for increasing the lifetime of the krypton lamp.
该电源对氪灯实行合理的低压起动，对延长氪灯使用寿命有积极的现实意义。
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