см. тж. в какой бы форме ... ни встречался; встречаться; если он существует; иметь место; иметься; не ~

• Such stresses obtain when ...

• Many such systems are in existence (or are found, or exist, or are available), (or There are many such systems, or There exist many such systems).

• Electromechanical devices are (still) with us (today), and will be around for a long time to come.

• The Solar System has been in existence for five billion years.

• Olivine is unstable under the low temperatures and pressures that prevail at the surface.

• Such eddies have been known to persist for two years.

• Although corrosion by gases is similar to corrosion by liquids, two important differences are found.

• Both polymeric and dimeric hydrogen bonding structures can occur in solution.

• Cold climates occurred in regions that are hot at the present time.

• Such factors are always found in pairs.

см. тж. имеется

• The vibrations of the molecule are of three types.