curve variations造句

More than 50 binaries are known in each of the main groupings : belt asteroids, and trans-Neptunian objects, not including numerous claims based solely on light-curve variation.
Initially thought to be a false positive due to light curve variations by a self-luminous object, it was later revealed that due to low density of Kepler-91's shape is distorted to slightly ellipsoidal shape due to gravitational effects of the planet.
It's difficult to find curve variations in a sentence. 用curve variations造句挺难的