The fifth group on the list is people twenty-five to sixty-four with chronic, or long-lasting,health problems.

VOA: special.2009.08.18

Memory cells are long lasting cells that remember this exposure and can respond very quickly on second exposure.

记忆细胞可以长时间记忆与抗原的接触,并在再次免疫中迅速做出应答

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But she says the research does show the need to study whether or not there are long-lasting effects of repeated exposure over several years.

VOA: special.2011.03.02

He noted that doctors already use spinal cord stimulation in people to help reduce long-lasting pain.

VOA: special.2009.04.07

Speaking by Skype, Laura Middleton noted two long-lasting effects that physical activity can have on teenagers.

VOA: special.2010.07.07

The new report says widespread obesity is increasing the rates of chronic, or long-lasting,disease.

VOA: special.2009.07.21

But politics is (takes) a long, long time to make any significant, long-lasting difference."

VOA: special.2010.05.09

He says members of Banaa want to bring about long-lasting change in Sudan.

VOA: special.2009.01.28

She says Washington is delivering on President Obama's promises by helping local communities develop long-lasting solutions and not by focusing on one-time projects.

VOA: standard.2009.11.03

"It will not be long lasting. For two,three months .

VOA: standard.2009.05.10