This input/output (I/O) operation is time-consuming, compared with the amount of time required to access data that’s already in computer memory.
与访问已经在计算机内存中的数据相比，这种输入/输出 (I/O) 操作非常耗时。
2
virtio is an input/output (I/O) para-virtualization framework for Linux that simplifies and expedites I/O traffic from a VM to a hypervisor.
virtio 是一个 Linux 的输入/输出（I/O）准虚拟化框架，它简化并加快了 VM 到管理程序的 I/O 通信。
3
The front end also saw changes in version 4.2 with the overhauling of C++ visibility handling and support for Fortran 2003 streaming input/output (I/O) extensions.
在 4.2 发行版中前端也有所变化。 修改了 C++ 可见性处理和对 Fortran 2003 streaming input/output（I/O）扩展的支持。