The study centered on couples between the ages of thirty and forty-four who were born in the United States.

VOA: special.2010.02.19

But he also says they dispute the common belief that Chinese education is centered on repetition and memorization.

VOA: special.2010.12.16

Most of the research centered on rice, an important crop in those three West African countries.

VOA: special.2010.03.23

He held a nationally broadcast news conference Wednesday night that centered on health care.

VOA: special.2009.07.25

Much attention has centered on a two thousand one speech when she said: "I would hope that a wise Latina woman with the richness of her experiences would more often than not reach a better conclusion than a white male who hasn't lived that life."

VOA: special.2009.07.18