Uh, the security camera microphone is unidirectional.

监控摄象头上的麦克风的。

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

因此，文化交流变得，参观者观察而不参与，只吸收选择性呈现的东西。

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

它们有气流，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.

这种电流过改变阴极的电压来控制，这使得它释放更多或更少的电子。

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

React之所如此成功的原因之一在于，它采用了这种数据流的理念，并将其引入到了前端开发中。