| 释义 |
pen·e·tra·tion
\ˌpenə.ˈtrāshən\ noun
(-s)
Etymology: Latin penetration-, penetratio, from penetratus (past participle of penetrare) + -ion-, -io -ion
1. : the act or process of penetrating
< Indian groups … angered by the constant penetrations of whites into their new territories — P.W.Gates >
< the penetration of the theater by scholarship and taste — R.W.Speaight >
as
a. : the act (as of a foreign diplomatic or commerical body) of entering a country so continued or repeated that actual establishment of influence is accomplished
b. : an attack that drives a wedge into or through the enemy's front
< when the situation does not favor an envelopment, the main attack is directed toward a penetration — C.E.Welsh >
c. : flight in air warfare over enemy territory and through enemy air defenses to attack ground targets
< a shallow penetration mission >
< penetration tactics >
< a penetration fighter >
2.
a. : the depth to which something penetrates; specifically : the depth to which a projectile sinks into any substance at which it is fired
b. : the power or ability to penetrate or its manifestation : penetrativeness
< used a lighter oil for its superior penetration >
< the human eye aided by telescopes and microscopes of ever greater penetration >
specifically : the ability to discern acutely the inner nature or meaning of something or the resulting perceptive quality of expression (as in a written work)
< a writer who analyzes the underlying causes with great penetration >
< good little novels, full of Gallic irony and penetration — Time >
c. : depth of field (as of a microscope)
d. : the extent to which a commercial product or agency is familiar or sells in a market
< the manufacturer's view of the dealer's performance is based on penetration of the market — Hartley Howe >
3. : the intersection of a minor architectural form and a major one
< the penetration of a minor vault with a main vault >
4. : the penetrability of a bituminous material expressed as the distance that a standard needle vertically penetrates a sample of the material under known conditions of loading, time, and temperature |