怎么理解这两句话啊?

题目

怎么理解这两句话啊?
1:I believe the best way to repay their devotion and love is to bear in mind what they have taught me,live up to their expectations and be a useful member of society.这句话怎么理解,尤其是“bear in mind”和”live up to “
2:The standard of living has changed a great deal in recent years.其中的”a great

答案

1.我认为报答他们的爱和献身和爱的最好方法是牢记他们教给我的东西,不辜负他们的期望和成为一个对社会有用的人.
bear in mind:牢记
live up to:不辜负;遵守
2.在近几年中,生活标准改变了很多.
a great deal:很多,大量