Researchers have long known that bone marrow produces and contains monocytes.

VOA: special.2009.08.25

Well, is this the same body as the-- as the long bone-- ? a fleshly bone that was here last week?

这个躯体-,和上周站在这里的-,那个躯体是一样的吗？

耶鲁公开课 - 死亡课程节选

The bone flute is about twenty one centimeters long.

VOA: special.2009.08.18

The PKK has long been a bone of contention between both sides and prevented economic cooperation.

VOA: standard.2009.03.23

Also on board is a new exercise machine, which is part of ongoing studies into the effects of long-term space flight on muscle and bone loss in astronauts.

VOA: standard.2010.04.05

"We think because of the long term effect of the bone, there may be stress fractures that are not repairing and I think the bone is becoming brittle, and it's not exactly as if it occurs without any warning, but it occurs suddenly with minimal trauma."

VOA: standard.2010.03.14