But PCBs are persistent chemicals, and their effects are felt even today.

但PCBs是惰性化工品，即便是今天，它们的影响依然存在。

Two of them seem particularly resistant to the effects of PCBs.

其中的两种变异似乎具有特殊抵抗PCB的作用。

And DDT and PCBs two of the most poisonous and long-lasting substances known continue to threaten aquatic wildlife.

滴滴涕和多氯联苯是已知的两种毒性和持久性最强的物质，它们继续威胁水中的野生动物。

PCBs do their damage by binding to a protein called the aryl hydrocarbon receptor, or AHR, thus stopping it working properly.

PCB的危害来源于它们结合一种称芳香烃受体（AHR）的蛋白质，从而停止该类蛋白的正常运转。

PCBWay can quickly manufacture your PCBs with competitive prices and impeccable standards.

PCBWay 可以以有竞争力的价格和无可挑剔的标准造的 PCB。

For this, engineers had another innovation: printed circuit boards, or PCBs.

此，工程师们进行了另一项创新：印刷电路板或 PCB。

After having spilled PCBs and other pollutants into the river in the 1970s, many industries simply moved leaving the contaminated sites behind.

在上世纪70年代，多氯联苯和其他污染物排入河流后，许多行业搬离了这些受污染的地方。

PCBWay also offers Turnkey PCB Assembly services to assist you in populating your PCBs.

PCBWay 还提供交钥匙 PCB 组装服务，以帮助填充 PCB。

PCBWay can quickly  manufacture your PCBs with competitive prices and impeccable standards.

PCBWay 可以以有竞争力的价格和无可挑剔的标准造的 PCB。

But most PCBs stay around 2 to 10.

但大多数 PCB 保持在 2 到 10 左右。

Older designs of PCBs used components that took up much more space both on the board, and through the board.

旧式 PCB 设计使用的元件在电路板上和电路板内部占用了更多空间。

Printed circuit boards or PCBs are everywhere  and inside this mouse, you can find four of them.

印刷电路板或 PCB 无处不在，在这款鼠标中，可以找到其中的四个。

Question: What is the common material for PCBs in PCBA? Answer: FR - 4 (Flame Retardant 4) is a very common material for PCBs.

8. 问题：PCBA中PCB的常用材料是什么？答： FR - 4（阻燃 4）是 PCB 中非常常见的材料。

So, these are ducts (ph) and PCBs, heavy metals like lead and arsenic that have been in the soil, in sediment at these sites for decades.

因此，这些是管道 (ph) 和多氯联苯，重金属如铅和砷，几十年来一直存在于这些地点的土壤和沉积物中。

Or, for another example, some newer smartphones stack PCBs on top of one another in order to fit more space for a larger battery and more cameras.

或者，再举一个例子，一些较新的智能手机将 PCB 堆叠在一起，以便更大的电池和更多的摄像头提供更多空间。

Whether you're prototyping your next project, or ready to  mass produce thousands of your finalized devices, PCBWay can quickly manufacture your PCBs with  competitive prices and impeccable standards.

无论是在下一个项目作原型，还是准备大规模生产数千台最终设备，PCBWay 都能以有竞争力的价格和无可挑剔的标准造的 PCB。

Seven students and parent volunteers from Sky Valley Education Centre in the state of Washington said polychlorinated biphenyls (PCBs) that were made by the company gave them neurological and endocrine system conditions.

来自华盛顿州天空谷教育中心的 7 名学生和家长志愿者表示，该公司生产的多氯联苯导致他们的神经系统和内分泌系统出现问题。

By using PCBs and ICs together, one could achieve exactly the same functional circuit as that made from discrete components, but with far fewer individual components and tangled wires.

通过将 PCB 和 IC 一起使用，可以实现与分立元件完全相同的功能电路，但单个元件和缠绕的电线要少得多。

Also, take a look at our channel page where we cover other topics such as how touchscreens work, how PCBs work, or how cameras in your smartphone work.

此外， 请查看我们的频道页面， 我们在其中介绍了其他主题，例如触摸屏的工作原理、PCB 的工作原理或智能手机中的摄像头的工作原理。

31. Question: In a PCBA line, what is the function of a conveyor system? Answer: It transports PCBs through different production stages, ensuring a continuous and smooth production flow.

31. 问题：在 PCBA 生产线中，输送系统的作用是什么？答： 它在不同的生产阶段运输 PCB，确保连续和顺畅的生产流程。