He is obstinate and determined and will not give up.

　　他固執(zhí)、堅(jiān)決，不會放棄。

　　She will not give up her children without a struggle.

　　她不會輕易放棄自己的孩子。

　　Once they get an idea into their heads, they never give up.

　　他們一旦接受了某個想法，就永遠(yuǎn)不會放棄。