This is the 1008th most frequent French word.
concentrer
To focus or gather.
Here, 'se concentrer' indicates the action of focusing one's attention on the task at hand, which is preparing to pass the academic exam.
Il faut se concentrer pour réussir cet examen.
You need to concentrate to pass this exam.
In this sentence, 'concentrer' refers to the process of thickening a substance (juice) to decrease its physical volume, used in an industrial context.
L'usine est capable de concentrer le jus pour en réduire le volume.
The factory can concentrate the juice to reduce its volume.
Here, 'concentrer' denotes the act of directing or pooling resources or attention onto specific priorities.