Cobalt is a metallic element, atomic number 27 in the period table.

钴是金属元素，原子序是27。

It identified several different metallic elements, including iron, nickel, magnesium and aluminum.

它鉴定出几种金属元素，包括铁、镍、镁铝。

Silver is one of the few metallic elements that occurs naturally as the metal in nature.

银是多作自然界中金属自然存在金属元素之一。

Following renovation work during the 20th Century, certain metallic elements were removed from the famous French landmark and have been carefully preserved ever since.

经过20世纪翻新工程，某些金属元素被从这个著名法国地标上移除，并被小心翼翼地保存了下来。