In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
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Question: In chemistry and physics , activation energy is the energy which must be provided to a chemical or nuclear system with potential reactants to result in : a chemical reaction , nuclear reaction , or various other physical phenomena .

Answer: The activation energy of a chemical reaction is the minimum energy that is needed to make the reaction happen .


Question: Although the French troops would have a higher proportion of motorised units than their German adversaries , in view of the respective distances to be covered , they could not hope to reach their assigned sector advancing in battle deployment before the enemy did .

Answer: Although the French troops would have more motorised units than the Germans , they could not hope to reach their places in the battle before the enemy did .


Question: The Republic of the Congo , competing as Congo , first participated at the Olympic Games in 1964 , and has sent athletes to compete in most Summer Olympic Games since then .

Answer:
Since 1964 , athletes of the Congo have taken part in the " Olympic Movement " .