Sentence examples for are usually valid from inspiring English sources

Continuum theories are usually valid for waves with wavelength much larger than the size of primitive cell of crystal.

Moreover, CACs are usually valid only for one specific issue, rather than for a state's total debt portfolio, so investors can still buy a small subset of securities and block a country's CACs.

A large number of studies have been reported on the prediction of head and flow rate conversion factors (h and q) at the best efficiency point (BEP) between pump and turbine mode, but the theoretical and experimental correlations are usually valid only within a certain range of specific speeds for pumps.

If they are performed professionally, the results are usually valid and reliable.

These are usually valid for 10 years and there is a legal requirement for drivers to renew the photograph at the same time as they renew their licence.

Assuming that equilibrium exists between the dissolved and particulate phases, which are usually valid in Ca, Cl, and SO4 modeling studies, the partition coefficient, P, is defined as follows: P = Toxics sorbed t o sediment mass of toxics / mass of sediment Dissolved toxics mass of toxics / water volume = r C d (5).

Coupons are valid for a year, and a ticket based on a coupon is usually valid for a further year.

For instance, each sales unit could negotiate a transfer price with its internal source for a certain product in a set range that was usually valid for a year.

But a State Department official said travelers should still go to the local embassy or consulate the next day to start the process of obtaining an emergency photo-digitized passport, which can take 24 to 48 hours and is usually valid for up to a year.

Had he not done so, gay marriage might have spread to other parts of the country, since a marriage licence granted in one state is usually valid in others.Second, Mr Romney has backed a campaign to reverse the court's decision.

This is usually valid for the lattice-matched epitaxy of AlGaAs on GaAs [21].