?拼到底

... bitter is the end 痛苦完结了 ; 惨痛的结局 ; 结束是痛苦的 to the bitter end 拼到底 To a bitter end 一个痛苦的结束 ...

?到最后

to the bitter end 直到死；到最后 bite off more than one can chew 从字面理解，是“要嚼比所能嚼碎的更多的东西＂的意思，即“贪多嚼不烂＂。

?直到最后

... to the bitter end 直到最后(到底)... bring someone to his wit's end 使某人智穷计尽... to the end of the chapter 到最后(永远地)...