1、both意思是兩者、雙方, ...意思是既...又...、...和...。
2、例句:
(1)Both Helen’s parents are doctors.海倫的父母都是醫生。
(2)She can both speak and write Japanese.她會用日語説和寫。
(3)Both of her parents went to college.她父母都上過大學。