normally open

基本解释

Control mode: Normally open □, NC □, self-protection type □.
控制方式：常開□、常閉□、自保式□。
Normally Open A contact pair that is open when the relay is not energized.
在繼電器未受激勵時保持閉郃的觸點對。
Control Type:Normally Closed, Normally Open, Double Acting.
控制形式：常閉型、常開型、雙作用型。

That means they can hitch-hike around in ways that would not normally be open to them because of their fragility.
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The build-up in excess reserves reduced the money creation that would normally have accompanied net open market purchases of assets.
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