4 sentences

1. 从屏幕顶部向下滑动两次。

   cóng píng​mù dǐng​bù xiàng xià​huá dòng liǎng cì.

   Swipe down from the top of the screen twice.

   Source: CCMatrix

2. 我开始向下滑。

   wǒ kāi​shǐ xiàng xià​huá.

   I started sliding down.

   Source: OpenSubtitles

3. 用两根手指从屏幕顶部向下滑一次，或用一根手指向下滑两次。

   yòng liǎng gēn shǒu​zhǐ cóng píng​mù dǐng​bù xiàng xià​huá yī​cì, huò yòng yī gēn shǒu​zhǐ xiàng xià​huá liǎng cì.

   Swipe down from the top of the screen once with two fingers, or twice with one.

   Source: CCMatrix

4. 服务标准已经下滑。

   fú​wù biāo​zhǔn yǐ​jing xià​huá.

   Service standards have slipped.

   Source: CCMatrix