1、I told him to take them off at once.__Usually_, he will agree,but this time he put his foot down.我让他立刻脱下.通常,他会同意,但是这一次他这次他很坚持.
put his foot down.在这里有坚持,固执己见的意思
2、that my son's strong will on wearing giant pants was just an __instance__of the __generation__ gap __between_ us我儿子要穿松垮裤子的强烈意愿是我们“代沟”的 例子.