And you can set your energy reference to be zero.

能量的参考点可以任取。

youdao

And we can take that constant of integration to be whatever we want. Energy is all relative to some reference point.

可以任取，因为能量的参考点可以任取。

youdao

Now, the kinetic energy and the momentum depend on your reference frame.

那么动能和动量，取决于你的参考系。

youdao

On behalf of UNESCO, Dr. Shahbaz Khan s presentation focused on the water issue with reference to energy needs of the growing world population.

UNESCO: NATURAL SCIENCES

"Desalination requires a lot of power ... we estimate that about four tonnes of carbon are emitted per million gallons of freshwater produced here, " he says, with reference to the energy-intensive process of removing salt from seawater (see factbox).

CNN: Counting the carbon cost of bringing water to the desert

In Dr Attari's study, for example, the survey provided a reference measure by stating the amount of energy used by a standard light bulb.

ECONOMIST: Energy conservation