Many of these have a feedback mechanism, where users indicate which outputs are useful.

其中许多都有反馈机制，用户可以指出哪些输出是有用的。

Either of these conditions can serve as a negative feedback mechanism that adjusts prices downward.

不管哪种情况都会有助于形成促使价格下行的负面反馈机制。

But there's a feedback mechanism, one thing leading to another.

但是有一个反馈机制，一件事导致另一件事。

But what if, instead, your eyes worked as a positive feedback mechanism? In sunlight, your pupils would open wide and damage your eyes.

但要是人的眼睛发挥的是正面反馈机制作用，结果会怎样呢？在太阳光下，瞳孔就会张大，从而对眼睛造成伤害。

All lasers have: an energy source, a feedback mechanism, and a medium to amplify light.

所有激光器都具有：能量源、反馈机制和放大光的介质。

So, the climate is one thing, but there's a lot of other threats that might have a faster feedback mechanism?

- 那么，气候是一回事，但还有很多其他威胁可能有更快的反馈机制？

We added citations and introduced forms of friction to encourage back and forth collaboration and included feedback mechanisms so people could let us know when we get it wrong.

我们添加了引用并引入了摩擦形式以鼓励来回协作，并包含了反馈机制，以便人们可以在我们出错时让我们知道。

They all have an energy source, such as a lamp, some sort of feedback mechanism, like this pair of mirrors, and also some medium, like the ruby crystal, which can amplify the light.

它们都有一个能源， 比如一盏灯， 某种反馈机制，比如这副镜子， 还有一些介质， 比如红宝石水晶， 可以放大光线。

You would then follow with a list or another sentence detailing exactly what the three parts are, in order: These are the energy source, the feedback mechanism and, finally, a medium to amplify the light.

然后你会用一个列表或另一个句子来详细说明这三个部分是什么， 顺序是：这些是能源，反馈机制，最后是放大光的媒介。