If the initialization is expensive, or the code is called simultaneously from multiple threads, the impact of this repeated creation may still be an issue.
如果初始化的代价高昂，或者从多个线程中同时调用该代码，则这一重复创建的影响仍然可能成为问题。
A high level energy group was added into this repeated experiment. The experiment included three groups i. e. high, medium and low energy levels.
本重复试验增加一个高能组，共设高、中、低三个能量水平组。
A high level energy group was added into this repeated experiment. The experiment included three groups i. e. high, medium and low energy levels.
本重复试验增加一个高能组，共设高、中、低三个能量水平组。
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