41.   The level of investment is not the only factor contributing to growth.

42.   The lower language level does not mean a low interest level Headway Pre-Intermediate is full of stimulating and accessible texts.

43.   The medical experts found potassium levels were particularly high in some children.

44.   The next level of control is the upper motor neuron with cells of origin in the sensorimotor cortex.

45.   The quantum level is the level of molecules, atoms, subatomic particles, etc.

46.   The serum potassium level is sometimes helpful in determining acid-base status.

47.   The simpler level is a search for the correct output for some particular instance.

48.   The third level is one of interdependence and mutual growth and development, of synergy.

49.   There are different levels, and it just depends on how important working is to you.