Each physical link includes a host adapter in the primary disk subsystem and a host adapter in the secondary disk subsystem.

每条物理链路包括一个位于主磁盘子系统中的主机适配器，以及一个位于辅助磁盘子系统中的主机适配器。

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The various network device drivers run at the interface layer, which receives and transmits data from and to the physical link.

各种网络设备驱动程序在接口层运行，该层从物理链路接收数据，并向物理链路传输数据。

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Figure 2 below shows the different layers through which the TCP system call propagates before being sent out on the physical link.

图2显示了TCP系统调用在物理链路上发出之前进行传播的各个层。

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There was not a strong link between the amount of physical activity and the extent of impairment.

VOA: special.2010.07.07

There is still no physical link between the mainland and Sicily, home to one in 12 Italians and there remains much scepticism about the wisdom of the Berlusconi government's promised bridge.

ECONOMIST: Southern Italy's ills

As our map shows, the Israelis have been steadily tightening a physical link between the oldest downtown part of Hebron, where the holiest places are situated, with the modern settlement of Kiryat Arba.

ECONOMIST: What would happen to Hebron under a two-state solution?

The plug is the physical and economic link that makes it possible, for the first time, to connect two nearly independent parts of our energy economy--the oil and the non-oil domains.

FORBES: Magazine Article