![These are hydration backpacks.
They're for efficiency.
These are hydration backpacks.
They're for efficiency.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
These are hydration backpacks.
They're for EFFICIENCY.
The Big Bang Theory Season 10, Episode 20
![and its quantum efficiency
is off the charts.
and its quantum efficiency
is off the charts.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
and its quantum EFFICIENCY
is off the charts.
The Big Bang Theory Season 12, Episode 7
![Allowed me to correct
for the observational efficiency.
Allowed me to correct
for the observational efficiency.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Allowed me to correct
for the observational EFFICIENCY.
The Big Bang Theory Season 3, Episode 4
![You cannot beat
the thermal efficiency
of the C3.
You cannot beat
the thermal efficiency
of the C3.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
You cannot beat
the thermal EFFICIENCY
of the C3.
Breaking Bad Season 2, Episode 10