Humans who retire to do nothing lose their brain mass, whereas those who keep active mental interests maintain mass and even increase it.

退休后什么也不做的人会失去脑质量，反之，那些保持活跃脑力兴趣的人能保持脑质量，甚至增加脑质量。

youdao

Light at night increases mice body mass, apparently by shifting food intake to times when the animals are less active.

夜晚的灯光会让老鼠身体发胖。当这些小动物不那么活跃时，灯光明显改变了它们的进食次数，因而造成体重增长。

youdao

Sunspots are dark patches marking magnetically active regions that often host solar flares and violent belches called coronal mass ejections.

黑子是太阳表面比较暗的区域，也叫活动区。那里经常发生耀斑和日冕物质抛射等剧烈的喷发现象。

youdao

Visitors can see how an active volcano adds mass to the island.

VOA: special.2010.09.08

Assemble and sustain a critical mass of active members across and beyond the enterprise.

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Many analysts believe that IRRC's new database, coupled with legislative moves in Congress, could alter the landscape of global investing and prompt U.S. fund managers to unload stocks of companies active in countries involved with terrorism and weapons of mass destruction.

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Mass Effect 3 was a great testing-ground for a more active consumer base, and no matter how this all shakes out, I think this experience has been a good one for gamers and the industry.

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