In this tube, we have an ionization chamber.

在管子里，我们有一电离室。

Second, in our explanation we simplified the circuitry of the smoke detector's ionization chamber.

其次，在我们的解释中，我们简化了烟雾探测器电离室的电路。

In other words, they produce the greatest number of ions and a steady flow of current in the ionization chamber when no smoke is present.

换句话说，当没有烟雾时，它们会在电离室内产生最多的离子和稳定的电流。

However, in this contraption, called an ionization chamber, we want to use alpha decay to help us detect smoke.

然而， 在做电离室的装置中，我们想利用阿尔法衰变来帮助我们检测烟雾。

In reality, the top middle cylinder is also an ionization chamber, and the circuitry senses the voltage of the middle disk and compares the ionizing activity in the top chamber to the reference ionizing activity in the bottom chamber.

实际上， 中间上方的圆柱体也是一电离室，电路会感应中间盘的电压， 并将上部电离室中的电离活性与底部电离室中的参考电离活性进行比较。