A study found that there are similar changes in brain structure between those who are bilingual from birth and those who start learning a second language later.
一项研究发现，在双语环境下成长的人和后天开始学习第二语言的人之间，大脑结构有相似的变化。
2
Luke can't walk, talk or feed himself because of a rare brain illness since birth.
由于一出生就患有罕见的脑部疾病，卢克不能走路、说话或自己进食。
3
Safe levels of human exposure vary widely, but on top of things like brain damage and birth defects, some have also been linked to cancer.