give in (to sb/sth)
to admit that you have been defeated by sb/sth 屈服；认输；投降
The rebels were forced to give in.叛乱分子被迫投降了。
to agree to do sth that you do not want to do 让步；勉强同意
The authorities have shown no signs of giving in to the kidnappers' demands.当局对绑架者的要求没有丝毫让步的迹象。
give up
to stop trying to do sth 投降；认输；放弃
They gave up without a fight.他们不战而降。
She doesn't give up easily.她决不轻易认输。
I give up─tell me the answer.我放弃了，把答案告诉我吧。
还有以下相关词组，释义不同，不在这里讨论：
give sth in (to sb)
give sb up
give sth&harr
to admit that you have been defeated by sb/sth 屈服；认输；投降
The rebels were forced to give in.叛乱分子被迫投降了。
to agree to do sth that you do not want to do 让步；勉强同意
The authorities have shown no signs of giving in to the kidnappers' demands.当局对绑架者的要求没有丝毫让步的迹象。
give up
to stop trying to do sth 投降；认输；放弃
They gave up without a fight.他们不战而降。
She doesn't give up easily.她决不轻易认输。
I give up─tell me the answer.我放弃了，把答案告诉我吧。
还有以下相关词组，释义不同，不在这里讨论：
give sth in (to sb)
give sb up
give sth&harr