TV series example of the word

The Big Bang Theory Season 4, Episode 5
SHELDON <font color="#E86CE4">(IN LOW VOICE)</font>: EZ Aquarii B, EZ Aquarii C...

Breaking Bad Season 5, Episode 16
You're low on methylamine. What happens then?

The Big Bang Theory Season 7, Episode 11
Well, I have an extremely low center of gravity.

The Big Bang Theory Season 7, Episode 24
When I'm feeling low, I have sex with a girl.

Game of Thrones Season 1, Episode 9
Stay low.