A calf is a young cow. A young female cow, especially one that has not yet had a calf, is called a heifer: H-E-I-F-E-R.

VOA: special.2009.07.21

In November, more than one-thousand e-mails and about three thousand documents were taken from the C.R.U.

VOA: special.2010.04.27

The United States is one of thirty-one countries in the O.E.C.D Gaetan Lafortune says in recent years many of the countries increased their efforts to hire foreign nurses.

VOA: special.2010.06.07

The stolen materials included more than one-thousand e-mails and two thousand documents.

VOA: special.2010.01.19

Professor Irvine-Halliday used a one-watt bright white L.E.D.

VOA: special.2009.12.21