Galileo his life and ideas, 25 activities 达尔文的自然观：his life and ideas with 21 activities Leonardo da Vinci his life and ideas, 21 activities Darwin and evolution his life and ideas, 21 activities 牛顿的物理学世界：his life and ideas with 21 activities His Life and Ideas,21 Activities Beethoven his life and music with 21 activities Beethoven:his life and music with 21 activities His life and times, with 21activities 并列题名：Beethoven:his life and music with 21 activities