Another one provides a communications link and the third is to provide ventilation.
另外一个钻孔用来提供通讯连接，第三个用以通风。
I also know that when I recommend a link for people to visit, I get one-third as many people to go to that link.
我也确知，当我推荐一个链接让别人去看的时候，只有三分之一的人真正去点那个链接。
I also know that when I recommend a link for people to visit, I get one-third as many people to go to that link.
我也确知，当我推荐一个链接让别人去看的时候，只有三分之一的人真正去点那个链接。
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