1.   But when the average cost curve is falling the Marginal cost curve lies below average cost.

2.   Dad lay below, stretched out under a heavy cloth of blue and gold.

3.   Large economies of scale mean that Marginal cost lies below average cost.

4.   The gallery canopy roof, which adjoins the house, is very old and lies below the house roof.

5.   The Mare basins have dark, rather smooth floors that lie well below the altitude of the highlands.

6.   They were always lying just below the surface of their life.

7.   Although the fact that the structure lies directly below the surface flow is suggestive, Jordan said, it is not conclusive proof that the two are related.

8.   Authorities still do not know how many people died in the accident, but divers scouring the murky waters painted a grim picture of what lies below.

9.   Below lies the true inferno, where throngs of prisoners wait in a yawning unlit corridor for their families and girlfriends on visiting days.

10.   Below the surface lie tensions created by a traditional U.N. peacekeeping culture that often disdains military solutions or even military expertise.