Doctors say not to return to physical activity for a few hours because serious conditions could develop.

VOA: special.2010.07.27

But,other countries have not. Critics of Mr.Obama's plan say not returning to the Moon could jeopardize America's leadership in space exploration.

VOA: standard.2010.04.21

But tech-saavy onlookers say not for long.

VOA: standard.2010.03.09

But professors at big schools say there is not enough time to write evaluations for each student in large classes.

VOA: special.2009.03.05

People who have studied Mary Lyon say she was not fighting a battle of equality between men and women.

VOA: special.2010.06.27

The researchers say many, if not all,people likely have these antibodies but do not always produce or use them efficiently.

VOA: special.2009.03.04

If not,they say, the future of food security, economic development and social stability in dry areas will be put at risk.

VOA: special.2010.02.08

Also,some people say they have not gotten enough details of the plan to be able to make up their minds.

VOA: special.2009.08.14

For example, if you say bad things about a person, the person might protest and say "Do not bad mouth me."

VOA: special.2010.06.20

If your home is very small, you might say there is not enough room to swing a cat.

VOA: special.2009.09.27

Those who knew Hank Williams say he did not have the emotional strength to deal with his problems.

VOA: special.2009.11.22

Experts say cabbage does not need full sun and grows easily if you water it regularly and protect against insects and disease.

VOA: special.2009.03.03

For example, if a child says things she should not say to her parents, she might be described as a mouthy child.

VOA: special.2010.06.20

The experts also say there is not enough evidence to decide about the benefits and harms of testing women seventy-five or older.

VOA: special.2009.11.18