bent down/keep down/nose down区别?
同学说：keep down 是低头,bent down是弯腰
崇文一模题：Evonne's head nose down in her studies the rest of that year
字典上都没有明确说明,您们怎麽想?怎麽解释崇文一模题（字典上nose down=俯冲）
我的字典不够，就没人帮忙查查bent down/keep down的意思？