The river was running pretty fast and lots of wood drifted.

河水非常湍急，水上漂浮着好多木头。

youdao

Smoothies are pretty fast, but I know that when you're running late, just tossing ingredients into a blender and pressing a button can require more time than you can spare.

鲜果奶昔食用方便，我知道当你上班快迟到时，你会把要吃东西都放进搅拌机，一按开关自行搅拌，这样你就可以有更多的时间。

youdao

RAM You probably know your computer has something called RAM which is where documents and programs live just temporarily while you're running them 'cause RAM tends to be pretty fast and whereas your hard disk is where programs and files live permanently.

也许你知道电脑有一个,正在使用的程序和文件都暂时存放在那里,而且会加快电脑速度,而硬盘是程序和文件,永久存储的地方。

哈佛公开课 - 计算机科学课程节选