If you switch tabs to the Test environment TAB (as shown in Figure 8), you see a different view, which will eventually contain each environment that you want to cover.
如果您切换至Test Environment项时(如图8所示)，您可以看到一副不同的景象，它最终会包含您将会碰到的每一个环境。
Use blinds or blackout curtains to keep out light. Switch off or cover anything that emits light, such as an alarm clock.
在睡前灯光越暗越好，最好是一点灯光也没有，用一些黑色的窗帘阻挡灯光，替换所有会吸光的东西，如会发光的钟。
Flow indicator light integral with switch cover. Indicates flow or no flow conditions.
与开关盖一起配置的流量指示灯。指示有流量或无流量情况。
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