They include dialogue, synchronous and asynchronous sound effects, and music.

它们包括对话、同步和异步的音效以及音乐。

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Asynchronous sound effects, on the other hand, are not matched with a visible source of the sound on screen.

另一方面，异步音效与屏幕上的可见声源不匹配。

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Asynchronous sound effects, on the other hand, are not matched with a visible source of the sound on screen.

另一方面，异步音效与屏幕上的可见声源不匹配。

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