Whoever these Indians were they well understood the principles that governed civilized warfare.

He had understood the principles then, but he had not realised their truth.

He understood the principles of piano construction, and was, therefore, no rule-of-thumb man.

He hadn't really understood the principles then, but now it was all coming clear.

They understood the principles of aseptic surgery very well.

Gordon understood the principles well.

He understood the principles, he had seen them driven, he had had their operation explained to him more than once.

Here, too, we see how carefully he studied the nude figure, and how well he understood the principles of modelling.

Walker understood the principles, but he had never experienced the power of the sword's magic himself, so they were reduced to fencing without weapons.