The phrase 'tracing a trajectory' is correct and usable in written English.
You might use it to refer to an action that is changing and becoming more distinct over time. For example, "We have been tracing a trajectory of success as we continue to reach our goals."
Ms. Hansen has studied the fate of used clothes that Americans donate to charity, tracing a trajectory of old T-shirts and jeans, not to mention bizarre polyester shirts with four-inch collars, through the salvage houses of North America to the Zambian bazaars known as salaula, a word that, in Bemba, means "to rummage through a pile".
This study compares three learning methods in a within-subject design by having 18 good and 18 poor 8-year-old writers master unfamiliar, letter-like patterns by (1) tracing a trajectory on a screen, (2) tracking a moving target (pursuit), and (3) performing the pattern using written explicit instructions.
The "two-third" law was used to generate trajectories for this Experiment in order to prevent any dependence of the teacher's specific way of tracing a trajectory.
In a half-century ride of honor and humiliation, former Representative Mario Biaggi, Democrat of the Bronx, traced a trajectory captured in sometimes screaming headlines.
In May, July and August, law enforcement and homeland security officials made high-profile announcements that traced a trajectory of rising alarm about a possible attack timed to the election season.
His work had traced "a trajectory that starts with the driest copying, where I trumpet being the most uncreative writer on the planet, and the most boring writer that ever lived," he said.
Paul, however, might ponder the career of Patman who traced a trajectory from populist idealist to economic crank while serving in Congress.
Early on, sitting in a case side by side, as their recipients assuredly would not have, are letters to three different women tracing an eternal trajectory of hope and failure.
Even his sexual identity, even after just a few years, started to wane, tracing a fairly typical trajectory for inmates.
And as prices have halved, digital radio has started to trace a similar trajectory in America as it did a decade ago in Britain, Denmark, Norway and Switzerland.The leader of this is HD Radio, a broadcasting technology that allows local radio stations to add digital channels to their existing analogue broadcasts.
Many of Shriver's plotlines trace a downward trajectory, in which one step off a straight and narrow path leads to chaos, often of the sexual kind.
