每重演一次，她表演的效果就更好一些。
She acted the part more effectively each time she replayed it.
研究发现，如果每周只服用一次阿司匹林，则没有任何有益的效果。
The study found that there were no beneficial effects for people who took aspirin only once a week.
打开文件和读取文件内容一次完成，生成的效果与第一个显式示例相同。
You open the file and read its contents all at once, producing the same result as the first, explicit example.
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