People can take one or both of them.

VOA: special.2010.02.18

"It seems that more clarity is likely to emerge about who did what to whom and whether or not war crimes, crimes against humanity and other very serious human rights abuses were committed by one or both sides,"

VOA: standard.2009.10.25

But in the United States Senate, I can think of no one who engendered greater respect or affection from members on both sides of the aisle."

VOA: standard.2009.08.26

"When we do a knee replacement, we remove one or sometimes both of the cruciate ligaments - which are the ligaments in the center of the knee.

VOA: standard.2010.08.11