Because the new propellant provides improved performance and volumetric efficiency compared to hydrazine, more of it can be stored in propellant tanks of the same volume, resulting in a 50-percent increase in spacecraft maneuvering capability for a given volume.
Superficial Anatomy - Definition. In anatomy, superficial is a directional term that indicates one structure is located more externally than another, or closer to the surface of the body. The opposite of superficial is deep. For example, the spine is deep in the body, while the skin is superficial. The term superficial is a relative one.
Shallow means not very deep. Used metaphorically it is a derogative term used to describe people who are perceived to be superficial or without depth. There is no standard definition of what constitutes depth in this sense, but usually an individual is considered deep if they seem to be philosophical. By contrast, somebody who appears superficial, materialistic, or petty is likely to be denounced as shallow.