种子和果实的扩散是维持生态系统结构与功能的关键过程。对大部分植物而言，种子和果实的扩散是其生命周期中唯一能够实现个体迁移的阶段。与动物传播相比，依靠风力传播的植物更容易受到气候变化的影响，因为动物活动会将种子或果实运送到更适宜动植物生活的地方（定向传播）。早渐新世是“冷室气候”的起点，欧亚大陆植被从晚始新世的亚热带常绿阔叶林转变为温带落叶混交林。这一时期植物种子和果实的主要扩散方式是什么？欧亚大陆 ...

PRAGUE, July 15 (Xinhua) -- The Czech Republic will not join the purchase of U.S. weapons for Ukraine at this time, Czech Prime Minister Petr Fiala said on Tuesday. U.S. President Donald Trump announc ...

PRAGUE, July 4 (Xinhua) -- A major power outage that struck the Czech Republic on Friday was caused by a technical fault, Czech Prime Minister Petr Fiala told reporters at a press conference, noting ...

Europe (40 countries): Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, ...

2025年2月20日 来源：财政部新闻办公室 为探索在境外发行绿色主权债券，财政部坚持以习近平生态文明思想为指引，参考国内外最佳标准，制定了《中华人民共和国绿色主权债券框架》，现对外发布。未来，财政部将以此为基础在境外发行中国绿色主权债券，丰富国际市场高质量绿色债券品种，吸引 ...

(Adopted at the Fifth Session of the Fifth National People's Congress and promulgated for implementation by the Announcement of the National People's Congress on December 4, 1982 Amended in accordance ...