The idea is that the matter we see does not have enough gravitational pull to keep galaxies together.

VOA: special.2009.07.21

They had to keep the herd together day and night and protect it from bad men and Indians.

VOA: special.2010.03.18

Material called a growth medium is put on the joint to keep it from getting dry and to help the two plants grow together.

VOA: special.2010.05.18

The majority leader of the Senate and the Speaker of the House of Representatives, together with the chairmen of committees,keep the business of Congress moving.

VOA: special.2009.11.01

Anderson knew she would have to work to keep her family together.

VOA: special.2009.01.25

President Lincoln freed the slaves and helped keep the nation together.

VOA: special.2009.02.06

Water destroys the chemicals that keep rock particles together.

VOA: special.2009.04.15

Lincoln fought to keep the Union together.

VOA: special.2009.02.09

Yet as president, Mr.Havel was unable to keep the country together.

VOA: standard.2009.11.17