平家は清盛の時代に全盛を極めた。
The Taira clan reached the height of its power in Kiyomori's time.
かつて全盛を誇ったこの商店街も、今ではすっかり寂れてしまった。
This shopping street, once at the height of its prosperity, has now fallen into complete decline.
当時はまさにテレビの全盛で、どの家でも毎晩同じ番組を見ていた。
Television was at its peak back then, and every household watched the same shows each night.