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The same is done for your target point within its own cluster (finding paths from all its border points to your actual destination).
，这一点在Line官方版本下载中也有详细论述
'It's our only option'
The 80386 introduced Virtual 8086 (V86) mode -- allowing real-mode DOS programs to run inside protected mode under OS supervision. While not full virtualization in the modern sense, V86 was the first practical hardware-assisted mechanism on x86 for running legacy software in a protected environment -- used widely in Windows 3.x and Windows 9x.