assert是什么意思？

The latest congressional report acknowledges the critical importance of technical training, but also asserts that the study of the humanities (人文学科)and social sciences must remain central components of America's educational system at all levels.

A politician noted for being cautious asserts that sustainable human development depends on the natural environment.

The research stations on King George lsland offer a glimpse into the long game on this ice-blanketed continent as nations assert themselves, eroding the sway long held by countries like the United States, Britain, Australia and New Zealand.

But an array of countries are rushing to assert greater influence here, with an eye not just towards the day those protective treaties expire, but also for the strategic and commercial opportunities that already exist.

But rarely, if ever, do they publicly take the argument a step further, asserting that a growing manufacturing sector encourages craftsmanship and that craftsmanship is, if not a birthright, then a vital ingredient of the American self-image as a can-do, inventive, we-can-make-anything people.