They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally.

它们会记录你的目的地、你的速度以及你的飞机是否一切正常。

youdao

You can set a pace and it will tell you how fast or slow you are, as you run!

你可以预设速度，并且提醒你跑步速度比预设的快多少还是慢多少。

youdao

You need not get bogged down in grammar and drills. You will be surprised how fast you learn when you are enjoying yourself.

你不必拘泥于语法和训练，你会吃惊的发现你愉快的时候学的是多么得快。

youdao

But more importantly you have to know how fast you are going - both vertically and horizontally.

BBC: Mars Curiosity rover success depends on 'crazy' landing

All that matters is how fast its earnings are growing and how many shares you can accumulate.

FORBES: Through the Looking Glass

On the other hand, if you look at how fast things are changing - in this Information Age the volume of facts in the world is doubling every five years.

BBC: News | Monitoring | President Clinton on Shanghai radio phone-in