bilingual แปลว่า

"Imagine that you had to figure out the lexicon and grammar of a language that you did not know. How would you go about trying to figure out the structure of that language? It would be enormously helpful to have a bilingual speaker of your language and the new language: With a bilingual, you can agree on rough translations of morphemes and words (although their usages would be potentially different between the languages, and even across speakers)."

"Most striking, numerous studies have even shown that bilinguals undergo a later onset of dementia, perhaps of around four years, on average. But some of these studies have failed to replicate, leaving experts wondering whether the effect is real, and if so, what exactly it consists of."