They are all students./All of them are students."他们都是学生兆竖。"Both of them are students./They are both students."他们俩都族旦大是学生。"放在句子中是不是可以更好地帮助楼迟族主理解?all用于三者及其以上的“都”both用于两者的“都”【公益慈善翻译团】真诚为您解答!
all are/is both are
都是:are
both
all