努力不一定能成功，但是放弃必定失败！
Attemps doesn't necessarily bring success, but forfeiting and giving up definitely lead to failure.
事后，我一直在想：有自信不一定能成功。
After that, I have been thinking: It is self-confidence is not necessarily successful.
努力，不一定能成功；不努力，绝不可能成功。
Work hard, can not succeed; Don't work hard, never likely to be successful.
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