• Acrolein is the simplest member of the class of unsaturated aldehydes, formula, CH[sub]2[/sub]=CHCHO.

• Acetone is a chemical compound of formula CH[sub]3[/sub]COCH[sub]3[/sub].

• The most important group of alicyclic hydrocarbons are the terpenes of the (general) formula C[sub]10[/sub]H[sub]16[/sub].

• Amide (acid) is a derivative of carboxylic acid with (or of, or having) the (general) formula R-(C=O)-NH[sub]2[/sub].

см. тж. со временем

• Such experiments will become more precise and more numerous as time passes.

• Since all machines wear, their defects worsen as time goes on (or by).

• Such optical binaries (stars) can be distinguished from real couples only in the course of time.

• In (or With) time some of these bacteria developed metabolic pathways that led to ...

• As time elapses, the concentration profiles take on a different shape.

• Over the years the electronic micrometer instruments have become more and more automatic.

• The magnetic poles of the Earth tend to move slowly with the passage of time.

• These substances have accumulated through time.

• The pole of relative rotation can change its position through time.

• These properties vary with time.