请问:give up 和give in意思一样吗?

不一样

give up是放弃
give in是交作业或者让步
意思完全不一样的

give up 放弃
give in 屈服，让步
例句：
After many failures, they finally gave up their plan to develop the permanent machine.
多次失败后，他们最后放弃了研制永动机的计划。
You have to give in sometimes to achieve your goals.
有时为了实现目标是需要做出让步的。

give up 放弃 give in 屈服

give up指行为或努力受挫或别的原因而主动放弃,可用作及物动词,跟名词或v－ing作宾语；也可作不及物动词；
give in指不再坚持自己的行为或观点等,而按别人的要求去做,即屈服的意思一般作不及物动词
give up sth/doing放弃某事/做某事.如:David gave up his work/smoking yesterday.
give in (to sb)(向某人)屈服.如:Liu Hulan never gave in to the enemy