As to the structure of text, the immanency and the system of perform, li Kai-xian's design has its rationality.

但从文本结构、内在结构、表演体制看，李开先的这种安排有其合理性。

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Even the earliest of tribes had a system of numeration that, if not advanced, was sufficient for the tasks that they had to perform.

即使是最早的部落也有一种计算系统，哪怕不先进，也足以完成他们必须执行的任务。

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The researchers hope to find a similar biologically based system to perform the other half of the process, the production of hydrogen.

研究人员希望能找到一个类似的基于生物的系统来执行该进程的另一半，氢的生产。

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We're going to talk about those in more detail in a couple of weeks when we talk about the immune system because these are the cells that perform and regulate the functions of our immune system that protect us from disease.

在后几周的有关免疫的课程上,我们会详细说明的,因为我们免疫系统的功能,要依靠这些细胞去完成和调节,它们使我们免受疾病侵害

耶鲁公开课 - 生物医学工程探索课程节选

Recently a detailed study conducted by the researchers at Columbia University has indicated that the cost-benefit ratio of using da Vinci surgical system to perform hysterectomies is not favorable at all.

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Once a second scan has been performed and it is determined that your workstation is free of any known malware, as a precautionary measure we recommended that you perform a back up of all vital files on your workstation and perform a full re-installation of the operating system.

FORBES: IBM Distributes Malware-Infected USB Sticks At Security Conference

This would require a pair of red dwarfs to encounter the solar system and perform an elaborate gravitational dance with it for a few thousand years.

ECONOMIST: To the ends of the earth