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。

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Keep frozen foods frozen to maintain quality, as bacteria will begin to multiply when the food is thawed.

使冷冻食品保持结冰而维持质量，这是因为当时食品解冻时，细菌将会开始成倍增长。

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They stop us offending other people, which helps us keep our jobs and maintain our relationships.

它们阻止我们侵犯他人，保住工作和维持关系。

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"I would be willing to do it if it was going to maintain my weight and keep my health."

VOA: standard.2010.03.30

"In order for us to keep our home land safe, in order to maintain our way of life, in order to ensure order on the international scene, then we cannot allow vicious killers to have their way,"

VOA: standard.2009.03.24

Small and medium-sized businesses need data, but they also need an attitude toward data that they want to keep and maintain clean data.

FORBES: How To Mine All That Customer Data

Richard Packham, managing director of the Labour-run council, said it wanted to increase revenue in order to keep staff and maintain services.

BBC: Great Yarmouth Borough Council

Many people use their mobile phone to keep in touch and maintain social ties with parents, siblings and children.

BBC: Hi-tech brings families together