四个英语短语下列短语分别是什么意思?keep up withcatch up withmake up for

keep up with赶得上；和…保持联系
1.跟上,不落在…后面：
Hurry up,or you won't keep up with them.快点,否则你就赶不上他们了.
Jane could't keep up with the rest of the class.简跟不上班里的其他同学.
2.赶上(某思想、风尚等)：
Young girls like to keep up with the latest fashions.年轻女孩喜欢赶最新潮流.
3.保持联系,和…来往：
She still kept up with her classmates after graduation.
毕业后她仍然与她的同学保持联系.
catch up with 赶上,追上；逮捕；处罚【强调原来有差距或落后,而经过努力等逐渐追赶上】
make up for
补偿；弥补；补救：
I have a lot of faults to make up for.我有许多缺点需要弥补.
What he lacks in speed he makes up for in strength.他的力量弥补了他速度的不足.