It is not needed 它不需要强迫
Most importantly, it needs to direct light where it is needed.
最重要的是,它需要引导光线到需要的地方。
People give blood to the centers, where it is kept until it is needed for medical purposes.
人们向中心机构献血,直到医疗需要前,这些血会一直贮存在机构里。
When it is needed, we'll provide a placeholder string.
当需要它时,我们将给出一个占位符字符串。
But they add that failure to implement fiscal consolidation where it is needed could undermine confidence and hamper growth.
VOA: standard.2010.06.27
So it's a really powerful and simple formalism, once we set up what is needed the go through it, right?
因此这是一种很强大而简单的形式,一旦我们定下需要什么,就可以推导出它,对吧?
If it is a lab it will include the lab instructions and often all the tools if there are software tools that are needed for that lab.
如果是实验室,将会包含实验指导,如果需要软件工具的话,还会提供工具。
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