Diligency is a key factors to be successful. As long as you knock at door long and loud enough, someone will answer it.
坚韧是成功的一大要素，只要在门上敲得够久、够大声，终会把人唤醒的。
2
The writer eulogizes the two main female characters whose kidneys are completely different in diligency, pertinacity as well as positive attitude towards life when they encounter difficulties.