The phrase "a fast drop in" is correct and usable in written English.
It can be used to describe a quick decrease in a particular measurement or value, such as prices, temperatures, or performance metrics.
Example: "There was a fast drop in sales after the holiday season ended."
Alternatives: "a rapid decline in" or "a swift decrease in".
The experimental results show a fast drop in shear or tensile strength of about 45% at the beginning of degradation.
The coarse-grained materials also oxidized rapidly and displayed a fast drop in pH during the incubation.
During this experimental run, a slow stress drop associated with multiple slow rupture propagation events persisted for approximately 20 ms, after which a fast drop in stress (as shown in A and D) occurred at seismic speeds.
Combining radiative forces plus a flux of Alfvén waves, we found in the simulations a fast drop in the wind density profile which strongly reduces the extension of the optically thick region and the wind becomes optically thin too close its base.
A few studies have suggested that a fast drop in platelet count after transfusion is caused by ongoing platelet consumption instead of platelet underproduction[ 21].
Rapid disappearance of IL-6 from serum could also explain a fast drop in APP concentrations during to the preinoculation levels in only SIV infected piglets [ 4].
Fed officials maintained their growth projections for 2015 and 2016, and foresaw a faster drop in unemployment and tame inflation.
Third ventricle injection of OLZ significantly decreased RER after 75 minutes, whereas intragastric OLZ resulted in a faster drop in RER after 30 minutes.
Lipid was defined as a signal-poor region within a plaque, with poorly delineated borders and a fast drop-off in OCT signal, whereas calcium was defined as a signal-poor region, but with sharply delineated borders and a gradual drop-off in OCT signal.
Since two-thirds of the public debt is indexed to short-term interest rates, monetary easing would prompt "a very fast drop in public debt," says Ricardo Carneiro, an economist at the University of Campinas.
Low to very low doses of TNF (10 – 250 μg/kg), which in wild type (WT) mice only induced a small and temporary drop in body temperature, caused a very fast drop in body temperature in MK2-deficient animals, followed by acute mortality 2 8 h after challenge.
