• The principal quantum number is of (considerable) importance (or significance) in defining ...

• Hydroxylating reactions are important (or essential) for the biosynthesis of corticoids.

• Each of these factors is important (or essential) to the end results.

• The bibliographies supplied will be valuable to workers in the field.

• This circumstance may have been of consequence for the origin of life.

см. тж. жизненно важен для; играть важную роль; исключительно ~

• This inertness is the most salient characteristic of the DNA molecule.

• A critical question ...

• The spectrophotometer is a key element in the process.

• Whenever dyeing is a paramount requirement ...

• An essential (or important) feature of the device is ...

• A major application of the high vacuum environment is in the design of vacuum tubes.

• A vital part of the magnetron is the permanent magnet.

• This approach is of significance despite the complexity of ...