Carbon monoxide is measured in parts per million in a normal atmosphere.

VOA: special.2010.02.02

Passengers are being encouraged to check ahead with their airlines, to arrive an hour earlier than normal and to bring only a single carry-on bag with them.

VOA: standard.2009.12.27

One observer said in a joking way that the space agency was just looking for a group of "normal,everyday supermen."

VOA: special.2009.06.10

But it was not a joke. NASA found seven normal, everyday supermen in a group of five hundred candidates.

VOA: special.2009.06.10

It would not fit in the normal place on the control board, so we hung it from a wire underneath.

VOA: special.2011.05.14

In addition,there is also a difference in the appearance of calorie-restricted monkeys and those on a normal diet.

VOA: special.2009.09.01

If a heart beats too slowly, the device will use electrical signals to help set a normal rate.

VOA: special.2010.06.29

This will help dry the soil. In normal conditions, placing mulch around rose plants is a good idea.

VOA: special.2010.06.15

If a heart beats too slowly, the pacemaker will use electrical signals to help set a normal rate.

VOA: special.2010.06.02

You may think it is just a normal chocolate until you begin to taste the deep and rich heat of these special spices.

VOA: special.2010.02.17

why not on Mars,too? I walked toward him and in a normal voice announced my name and said I had come in peace.

VOA: special.2010.07.17

But almost everyone else wanted to win the war quickly and return to a normal life.

VOA: special.2011.06.30

The overall key finding of our study is that the patient in Africa receiving antiretroviral therapy for HIV can expect to live a near-normal lifespan."

VOA: special.2011.07.20

But it also can be so severe that a person cannot live a normal life.

VOA: special.2010.03.30