at or on which 在那时
There is the danger that the high-speed connectivity of the Internet will reduce our attention span—that we will be incapable of reading anything of length or which requires deep concentration.
风险在于,互联网的高速连接会减少我们的注意力持续时间,从而导致我们不能阅读长篇论著,或是需要高度集中注意力的书籍。
Even if a disease is linked to travel, there is rarely any information about where those afflicted went, what they ate, how they behaved, or which vaccinations they had.
即便某种疾病与旅行有关,也很少有信息提及患者去过哪里、吃过什么、做过什么或接种过哪种疫苗。
But sometimes you want to know who, or which process, accessed the file.
但是,有时您还希望了解是谁、或者哪个进程对该文件进行了访问。
"For the health sector, it will be to be ready to cope with a disease, which will spread in areas where they do not spread or which may become more serious,".
VOA: standard.2009.08.30
So if we think about, for example, this red line here, which energy state or which principle quantum number do you think that our electron started in?
我们来看看,比如这里的这个红线,它是从主量子数,等于多少的能级发出的?
Which style or which taste do you want?
你想要什么风格或味道的?
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