The URL has been copied to your clipboard Share on Facebook Share on Twitter No media source currently available 0:00 0:04:16 0:00 Direct link 128 kbps | MP3 64 kbps | MP3 Pop-out player And now, Words and Their Stories, from VOA Learning English. Dust is very small pieces of earth or other matter. It is so fine it floats in the air. And it gets everywhere. Inside, it covers our floors, our belongings, and other surfaces. Outside,...

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.

It is the best to remain as unsuspicious as it is possible while using them. It is impossible to track you down solely by your look, unless you are a celebrity of course.