For instance, if a homing pigeon is to navigate with its Sun compass, its clock must be properly set by cues provided by the daylight/darkness cycle.
例如，如果一只信鸽要用它的太阳罗盘进行导航，它必须根据日光/黑暗的循环所提供的线索正确设置时间。
External devices — For instance, Universal Serial Bus (USB) ports or the system clock.
外部设备——例如，通用串行总线(usb)端口或系统时钟。
The alliance with CNN, for instance, meant they didn't have to compete against an established around-the-clock news channel.
例如，他们与CNN的结盟意味着，他们不必与一家成熟的全天候新闻频道展开竞争。
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