positional variation造句

The ambiguity characters were designed to encode positional variations found among families of related genes.
In the case of positional variation along the z-axis the density \ rho ( z ) is often given by:
For an example of the positional variation, consider the phrase ( in RPA orthography ) " kuv rau tshais rau koj noj " " I serve you breakfast ".
When a lens is located in front of the diffracting aperture, each plane wave is brought to a focus at a different point in the focal plane with the point of focus being proportional to the x-and y-direction cosines, so that the variation in intensity as a function of direction is mapped into a positional variation in intensity.
It's difficult to find positional variation in a sentence. 用positional variation造句挺难的