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• Styrene is polymerized to give polystyrene.

• The acetyl chloride reacts with the water to form (or yielding, or giving, or with the formation of) acetic acid.

• The potassium chloride and the sulphate of potash magnesia will react to yield (or produce) potassium sulphate and magnesium chloride.

• Electromagnetic radiation can interact with the ground state to produce an excited state.

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• 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.