启发式是在计算机易于攻击时关闭空窗的一种主动检测形式。
Heuristics are a form of proactive detection that closes the window during which computers are vulnerable.
声空化是声化学反应的主动力，对声化学产额的研究将能更好地利用声化学技术。
Sound cavitation is the driving force of sonochemical reactions. Investigation on sonochemical yield is useful in application of sonochemistry.
进而对声空化进行了讨论，强调声空化是声化学反应主动力的观点。
Furthermore the sound cavitation has been discussed with emphasis on the idea that sound cavitation is main motivation in the sonochemical reaction.
结论：空巢老人对社区卫生服务实际需求高，主动供给不足，存在供需失调现象。
Conclusion: The community health service demands of empty nest elderly were high; however, actual supply was much less. Supply-demand imbalance appeared.
结论：空巢老人对社区卫生服务实际需求高，主动供给不足，存在供需失调现象。
Conclusion: The community health service demands of empty nest elderly were high; however, actual supply was much less. Supply-demand imbalance appeared.
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