Robert Jones, director of design and construction for the Art Institute of Chicago at the time, stated in 1999 that Time was the first finished art piece to be made of any type of concrete.
罗伯特·琼斯，当时芝加哥藝術博物館设计和施工的负责人，在1999年声明，“时间”是已完成艺术品中第一件由混凝土制成的艺术作品。