3.Television seems to be firmly entrenched as the number one medium for national advertising.
电视看来要在全国广告媒介中牢地占据头等位置。
4.If the enemy dares to attack us in these entrenched positions,we will make short work of them.
如果敌人胆敢进攻我的阵地,我就消灭他。
5."Following the U.S. Supreme Court decision in Brown v.Board of Education of Topeka (1954), African American and white supporters attempted to end entrenched segregationist practices."