insisted是什么意思？

The big tobacco companies have always insisted that they are frank with their customers about the dangers of smoking and provide them with enough detail to make an informed decision.

When Jonathan Swift proposed, in 1729, that the people of Ireland eat their children, he insisted it would solve three problems at once: feed the hungry masses, reduce the population during a severe depression, and stimulate the restaurant business.

Gary insisted on buying the food for the picnic.