There’s this problem with repeating a certain reference work (even with word-by-word translation) on repeat in attempt to learn language. That is, your brain start memorizing whole sentences and their meanings instead of forming individual word by word associations. Even though, one might be able to fully understand the readings on which the language learner has done his exercise, he might not be able to extrapolate that learning, even to another passage that uses the very same vocabulary. Language learner should thus be wary of this illusion and constantly stream himself newer stuff (even though containing same level vocabulary).