Sentence examples for usually does not exist from inspiring English sources

As in many problems there may be multiple (conflicting) objectives, there usually does not exist a single optimal solution.

However, normal distribution usually does not exist in real chemical engineering practice, as it is hard to ensure the normality even for high-quality measurements.

In addition, the optimal evaporating pressure usually does not exist in engine exhaust heat recovery, and the distributions of exergy destruction are varied with working fluid categories and system design constraints.

Unfortunately, there usually does not exist (din IR) s.t.

However, in sparse, delay-tolerant networks like DTN, a connected routing path usually does not exist.

This opportunity usually does not exist for us as MLK Day is Bids Day for IFC chapters.

It is not the "murky atmosphere" of London that hides the colours of the ordinary halo; they usually do not exist, except dull red and orange, and perhaps a faint tinge of blue.

However, Spitzer's survey suggests that dense asteroid belts usually do not exist close to mature stars elsewhere--probably, Lunine notes, because large planets like Jupiter "sweep up the debris".

These stages usually do not exist independently.

The custom data extraction sheet we have developed is for use with clinical study reports, and may not apply to non-industry trials where clinical study reports usually do not exist.

The absence of sustained syndromic signals usually provides greater reassurance that an outbreak does not exist than the information obtained by immediate investigation.