| 单词 | pressure level |
| 释义 | pressure level (once / 513884 pages) n WORD FAMILY pressure level: pressure levels USAGE EXAMPLESAs a hearing researcher, he notes, he has the equipment to determine the sound pressure level and proper volume for children's ears. US News(Sep 07, 2016) Forty-one percent of commuters reported reduced physical activity, which can contribute to a higher body mass index and elevated blood pressure levels. Time(Sep 02, 2016) The researchers didn’t see a difference in blood pressure levels, mindfulness, well-being, and negative moods. Time(Aug 10, 2016) n the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit) Syn|Hypo|Hyper force per unit area, pressure blood pressure the pressure of the circulating blood against the walls of the blood vessels; results from the systole of the left ventricle of the heart; sometimes measured for a quick evaluation of a person's health gas pressurethe pressure exerted by a gas headthe pressure exerted by a fluid hydrostatic headthe pressure at a given point in a liquid measured in terms of the vertical height of a column of the liquid needed to produce the same pressure IOP, intraocular pressurepressure exerted by the fluids inside the eyeball; regulated by resistance to the outward flow of aqueous humor oil pressurepressure that keeps oil on the moving parts of an internal-combustion engine osmotic pressure(physical chemistry) the pressure exerted by a solution necessary to prevent osmosis into that solution when it is separated from the pure solvent by a semipermeable membrane corpuscular-radiation pressure, radiation pressurethe minute pressure exerted on a surface normal to the direction of propagation of a wave instantaneous sound pressure, sound pressurethe difference between the instantaneous pressure at a point in a sound field and the average pressure at that point suctiona force over an area produced by a pressure difference vapor pressure, vapour pressurethe pressure exerted by a vapor; often understood to mean saturated vapor pressure (the vapor pressure of a vapor in contact with its liquid form) acoustic radiation pressure(acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave air pressure, atmospheric pressure, pressurethe pressure exerted by the atmosphere systolic pressurethe blood pressure (as measured by a sphygmomanometer) during the contraction of the left ventricle of the heart diastolic pressurethe blood pressure (as measured by a sphygmomanometer) after the contraction of the heart while the chambers of the heart refill with blood arterial pressurethe pressure of the circulating blood on the arteries venous pressurethe pressure exerted on the walls of the veins by the circulating blood hypertonicity(of a solution) the extent to which a solution has a higher osmotic pressure than some other hypotonicity(of a solution) the extent to which a solution has a lower osmotic pressure than some other physical phenomenon a natural phenomenon involving the physical properties of matter and energy |
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