lasting a certain time
持续一段时间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Taken keeping temperature of the sink source working stably and lasting a certain time as target, sink source was optimized and freezing ice was selected as sink source.
以保持冷源工作稳定和一定工作时间为目标，优化选择了冷冻冰作为冷源，并对冷源腔进行了结构优化。
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