标题（Title） 一般不超过80个字符
EniG. Periodic Table of the Elements, Calculators, and Printable Materials
（74 个字符）
关键词（KeyWords）一般不超过100个字符
periodic, table, elements, javascript, calculator, desktop, wallpapers, printable, pdf, crystal, systems, paper, models, free, programs, games, download, gallery, bitmap, images, bookmarks, educational, posters, separation, cations, chemistry, css, cascading, style, sheets, its-90, temperature, 3D, black, white, colour, enig
（326 个字符）
描述（Description）一般不超过200个字符
Everything for chemists: from the periodic system in online and PDF versions, to online calculators and free software for chemists. English-Croatian chemistry dictionary and glossary is always at hand.
（201 个字符）
