perseverance是什么意思

　　例句：

　　The achievement of her goals relied mainly on her perseverance.

　　她主要是靠毅力實現(xiàn)了自己的目標。

　　Study requires perseverance.

　　學習要有鍥而不舍的精神。

　　Sometimes perseverance does win out.

　　有時候堅持就是勝利。