Uh, the security camera microphone is unidirectional.

监控摄象头上风是单向。

Consequently, the cultural exchange becomes unidirectional, with visitors observing rather than participating, and assimilating only what is selectively presented.

因此，文化交流得单向，参观者观察而不是参与，只吸收选择性呈现东西。

They probably had unidirectional air flow, just like modern birds do, making them very efficient at breathing, even while flying.

它们可有单向气流，就像现代鸟类一样，这使它们即使在飞行时也非常有效地呼吸。

This unidirectional current flow could be controlled by varying the voltage to the cathode, which makes it release more or less electrons.

这种单向电流可以通过极电压来控制，这使得它释放更多或更少电子。

One of the reasons why React was so successful is because it took that unidirectional flow, brought it to the front end.

React之所以如此成功原因之一在于，它采用了这种单向数据流理念，并将其引入到了前端开发中。