求翻译：1．作品主题是否蕴含优秀的文化价值和积极向上的主题思想。这是公益海报的灵魂所在，也是它的使命，设计者必须充分考虑作品主题的公益价值。常见的公益海报主题有：环境保护、倡导人类健康与安全（如交通安全、拒绝毒品、禁烟、卫生防疫等）、纪念重大历史事件、宣扬美德风尚、教育科学、弘扬民族精神等。2008年5月12日，中国四川发生了震惊世界的汶川大地震，给中国人民带来了巨大的伤害，很多国内外设计师都围绕这一事件展开了公益海报的创作，呼吁全世界人民伸出援助之手，帮助受困的人，在精神上鼓励和安抚受灾人民，帮助他们度过难关。是什么意思？

正在翻译，请等待...

1.works pretty good themes of cultural values and positive theme. This is a good poster the soul, and it is also its mission, the designer must fully consider the theme works good value. The common theme posters are good for the protection of the environment, human health and safety advocates, such

1. Theme contains theme of outstanding cultural value and positive thinking. This is where the soul of public service posters, as well as its mission, the designer must fully consider the theme of public value. Common public service poster theme: protection of the environment, promote human health a