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。

The result is fish that are more or less immune to PCB poisoning.

其结果是此鱼类或多或少的对PCB产生免疫作用。

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。

As is the way of evolution, however, some fish species have developed resistance to PCB poisoning.

然而，某些鱼种已经产生PCB抵抗，这就是进化。

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。

It appears to work equally well, whether or not it has PCB passengers on board.

无论结合PCB与否，他们照样工作。

So BGA devices some security conscious PCB design and PCB routing can make a big difference.

因此，BGA器件、一些安全意识的印刷电路板设计和印刷电路板布线可以起到很大的作用。

They also provide PCB  assembly services where they populate and solder the components to the PCB.

他们还提供 PCB 组装服务，将组件安装并焊接到 PCB 上。

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为芳香烃受体（AHR）的蛋白质，从而停止该类蛋白的正常运转。

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

为此，工程师们进行了另一项创新：印刷电路板或 PCB。

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，您可以找到其中的四个。

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。

You've got the PCB, the casing, the plate, which kind of make up the brains and the body of the keyboard.

你有PCB，外壳，板，它们构成了大脑和键盘的主体。

The casing sort of houses all of the components while the PCB is the actual electronic circuit that communicates with your computer.

外壳容纳了所有组件，而 PCB 是与计算机通信的实际电子电路。

This is because new bioleaching methods are being developed to get at some of the non-precious, though still valuable, metals in PCBs.

这是因为正在开发新的生物浸出方法，以去除 PCB 中一些不贵重但仍然有价值的金属。

Once these pampered bacteria are mixed with crushed PCBs in a reaction chamber they digest many of the metals within a day or two.

一旦这些被精心培育的细菌与粉碎的 PCB 在反应室中混合，它们就会在一两天内消化掉许多金属。

Estimates vary, but a tonne of PCBs could contain 150 grams or more of pure gold, which, because it does not tarnish, produces stable electrical connections.

估计数字各不相同， 但一吨 PCB 可能含有 150 克或更多的纯金，由于金不会失去光泽，因此可以产生稳定的电连接。

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。

Typically, the PCBs are removed and crushed before being either burned in a furnace to melt out metals or treated with chemical solvents, like strong acids.

通常情况下， PCB 会被取出并粉碎， 然后放入熔炉中燃烧以熔化金属，或者用强酸等化学溶剂进行处理。

The Cambridge plant has the capacity to process 1,000 tonnes of PCBs a year, although plans are already being discussed to build a much bigger one.

剑桥工厂每年可加工 1,000 吨 PCB，尽管已经在讨论建造一个更大的工厂的计划。