你是否对使用另一种语言有根本性的需求是成为一个双语能力者的决定性因素——与别人交流沟通的需要，学习或工作上的需要，参与社交活动等的需要。
The crucial factor underlying becoming bilingual is the need for another language — the need to interact with others, to study or work, to take part in social activities and so on.
使用双语或学习语言可以保持大脑功能，降低痴呆症的风险，同时“不用则废”理论也已经证明了其好处。
Being bilingual or learning languages preserves brain function and lowers the risk of dementia, and the "use it or lose it" theory also has proven benefits.
头脑训练是学习提高记忆力或智力的方式。这不错哎，但是尼尔，你还没达到双语的程度吧？
Brain training is where you're learning ways to increase your memory or intelligence. That's great Neil - but you're not exactly... bilingual... are you?
应用推荐