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It is difficult to make oneself concentrate for long periods.
让自己长时间聚精会神是很困难的。
《牛津词典》
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One is to make a name for oneself and the other is to keep it.
世界上有两件事情很不一样，扬名立万和保持声誉。
youdao
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One is to make a name for oneself and the other is to keep it.
世界上有两件事情很不一样，扬名立万和保持声誉。
youdao