1.When a bilingual person is speaking in one language, research shows that the other language is active in his or her mind.
相关研究发现，懂双语的人用一种语言说话时，另外那种语言也会在头脑中积极的运作。
2.The cognitive enhancement across the life span of a bilingual person is quite dramatic.
双语使用者的认知能力在一生中会有巨大的提升。
3.Compound bilingualism is the theory that a bilingual person relates words to their meanings in one of two ways.
一种理论，认为操双语的人有两种不同的方法把词和意义联系起来。
4.Observation shows that a truly bilingual person switches his body language at the same time he switches languages.
观察表明，一个真正的双语人的开关，他的身体语言在同一时间，他开关语文。