The overall efficiency varies considerably depending on what sort of power plant is used.

Consequently, the therapeutic efficiency of a transgene could drastically vary from one patient to another.

There are many different types of stationary fuel cells so efficiencies vary, but most are between 40% and 60% energy efficient.

The efficiency with which iron is absorbed varies depending on the source.

However, the relative efficiency of transmission by these routes varies.

For a given power supply, efficiency varies depending on how much power is being delivered.

The efficiency of each method of administration varies from drug to drug.

The efficiency will vary directly as the cube of the number of operators.

The efficiency of loudspeaker drivers varies with frequency as well.

Engine thrust and efficiency can vary greatly with speed and altitude.