这些工具是Macromedia Flash™文件，带有音效。请确认打开计算机的音量。Flash播放器软件在跑本段的Flash™播放软件是必要的。 These tools are Macromedia Flash™ files, and have sound. Make sure the volume is turned up on your computer. Flash™ Player software is required to run the Flash™ media in this section.
Macromedia Flash™是 Macromedia 公司在美国以及或其它国家的一个商标或注册商标 Macromedia Flash™ is a trademark or registered trademark of Macromedia, Inc. in the United States and/or other countries.
