如何添加声音上的切换按钮？
和标签允许直接为页面添加声音和视频，而无需动用冗长的嵌入代码。
The and tags allow webmasters to add sound and videos to awebpage, without having to use lengthy embed codes.
视频制作人通过拍摄、添加声音并编辑数字或模拟格式，创作电影、电视节目、视频产品或广告。
Creates films, television programs, video productions or commercials by filming, adding sound and editing in digital or analogue format.
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