3.The covers would be pulled tight, and the pillow would be centered just under the headboard.
被子会被拉紧,枕头就在床头板的正下方。
4.The political and economic life of the cities was centered on their temples, but it now seems probable that the cities had secular rulers from earliest times.
这些城市的政治和经济生活以寺庙为中心,但现在看来,这些城市很可能在早期就有世俗统治者。
5.Now their research is centered on the flip side of love.
现在他们的研究集中到爱的另一个方面。
6.Geocentric means Earth-centered, so the geocentric view holds that the Sun, the planets, and the stars, all revolve around the Earth, which is stationary.