坚定不移的；不屈不挠的；一心一意的；专心致志的；

1. marked by firm determination or resolution
    not shakable

    e.g. firm convictions
           a firm mouth
           steadfast resolve
           a man of unbendable perseverence
           unwavering loyalty

    Synonym: firmsteadfaststeadystiffunfalteringunshakableunwavering