i can discard that which is unfitting and keep that which proved fitting
我可以抛弃那些不合适的，保留那些被证明是合适的
以上为机器翻译结果，长、整句建议使用 人工翻译 。
I can discard that which is unfitting, and keep that which proved fitting.
我可以摒弃那些不合适的，保留那些被证明是合宜的东西。
youdao
I can discard that which is unfitting, and keep that which proved fitting, and invent something new for that which I discarded.
我能够摒弃那些不再合适的，而保留那些经过证明后合适的，并且再创造一些新的来取代被我摒弃的那些。
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