This is the 1768th most frequent French word.
concentration
Focus or accumulation.
Here, 'concentration' refers to the focus or attention paid by students to their studies.
La concentration des élèves est essentielle pour réussir à l'école.
The concentration of students is essential for success in school.
In this sentence, 'concentration' describes the proportion or amount of salt mixed within the solution.
Il y a une forte concentration de sel dans cette solution.
There is a high concentration of salt in this solution.
Here, 'concentration' indicates the measure or density of gases present in the atmosphere.