定义到第一个虚拟门户的链接(VPortal1)。

Define a link to the first virtual portal (VPortal1).

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这已经不是第一次讨论虚拟货币作为未来的在线支付方式。

It's not the first time that virtual currencies have been mooted as the future of online payments.

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内核地址空间中的第一页虚拟内存可通过内核代码访问，但是被标记为只读。

The first page of virtual memory in the kernel address space can be accessed by kernel code, but is marked as read-only.

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