您可以添加淡入淡出效果，使音频音轨的声音逐渐变大或变小，您还可以添加所有此类的特殊音效。

You can add fading effects, where the audio track gradually gets louder or quieter, or you can add special sound effects of all kinds.

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但有证据显示，烹调以及使用刀叉等餐具的进步使人类的牙齿逐渐变得弯曲不整齐并使人的面部变小。

But there is evidence that the advance to cooking and using knives and forks is leading to crooked teeth and facial dwarfing in humans.

youdao

但有证据显示，烹调以及使用刀叉等餐具的进步使人类的牙齿逐渐变得弯曲不整齐并使人的面部变小。

But there is evidence that the advance to cooking and using knives and forks is leading to crooked teeth and facial dwarfing in humans.

youdao