It does not derive advantage at the cost of others.
In any case, the situation was such that the Romans were bound to derive advantage from their observations.
In particular, under given circumstances of the security dilemma, what steps might a threatened state take to derive advantage by attacking first.
After having made considerable progress in the art, his father sent him to Italy, where he had himself derived such advantage from his studies.
Was it simply a matter that you wanted to derive whatever advantage you could from a cordial professional relationship?
He was apprenticed to a surveyor, but "derived very little advantage" from his master.
No nation has derived comparable advantage from it.
Ordinary people took advantage of the dislocation of civil society during the 1640s to derive advantages for themselves.
They appear, however, to derive advantage from making larger advances than their official rivals, and from doing business during more convenient hours.
Besides, he paid liberally for this espionage, from which he derived so much advantage.