'slight fluctuations' is a correct and usable phrase in written English.
You can use this phrase to refer to small changes in a given situation, such as in price, quantity, or size. For example, "The stock market experienced slight fluctuations last week."
In the atmosphere, the RH fluctuates periodically with the diurnal cycle, whereas the WVD shows only slight fluctuations.
The official annual art shows, the salons, succeed one another - and, with very slight fluctuations, Meissonier goes on being honoured and Manet goes on being covered in scorn.
Due to the mostly dry climates of the southern province19, slight fluctuations of relative humidity had a crucial influence in forest environments and their associated fauna9.
While periods of strong turbulence caused large fluctuations in prices in stock markets, these were often followed by relative calm and slight fluctuations.
Eddy's findings were considered of particular importance because they possibly indicated the Sun's potential to influence the climate on Earth with even slight fluctuations.
Mr. Marksteiner says that "since only slight fluctuations are to be established between different persons, it is possible, if appropriate, also to use a single reference curve for all persons to be identified".
Although slight fluctuations in shape and groove depths may be seen, overall the grooves are impressively similar (which is also reflected in our subsequent EELS measurements). Figure 2: STEM micrographs of a gold nanogroove.
"New elections would produce more or less the same results," with slight fluctuations among the various blocs, said Gianfranco Pasquino, a professor at the Bologna Center of Johns Hopkins University.
The slight fluctuations in Jupiter's gravitational pull, measured by shifts in the frequency of Juno's radio signals, will tell the density of the planet's interior and whether there is a rocky core within, where pressures might reach half a billion pounds per square inch.
