It's reading 93 parts per million.

读数为百万分之九十三。

Parts per million is commonly used as a measurement of what?

Ppm通常是用于测量什么?

Anything above 0.005 parts per million can trigger a toxic algae bloom.

任何超过百万分之0.005的物质都能引发有毒藻类的爆发。

And the tags could sense the substances at levels of a few parts per million.

而且这些标签可以在每百万的极少物质中感应到问题物质。

Even though it's enough to cause climate change, it's only 400 parts per million.

尽管这足以引起气候变化，但其浓度仅有百万分之四百。

The humidity level is at 56 percent and the amount of carbon dioxide is 1800 parts per million.

湿度为56%，二氧化碳含量为百万分之1800。

Methane is an important trace gas in Earth's atmosphere, at less than 2 parts per million by volume.

甲烷是地球大气层中一种重要的痕量气体，体积小于百万分之二。

Ahead of schedule, the concentration of carbon dioxide gas in the Earth's atmosphere has reached 400 parts per million.

比预期超前，地球大气中二氧化碳的浓度达到了 400/100万。

And that's because humans can taste it in solutions at really, really low concentrations, just a few parts per million.

那是因为人类可以在浓度非常非常低的溶解剂中尝到这种物质，仅百万分之一。

When you are talking about small levels of pollution, you're likely talking about it in terms of parts per million.

当你谈论小的污染级别, 你可能会谈论它的ppm。

The devices can detect gluten at slightly lower levels than the maximum concentration the FDA allows for packaged foods-20 parts per million.

该设备能检测到比美国食品药品管理局（简称FDA）所允许的包装食品麸质最高浓度百万分之20稍低的含量。

That is 2.4 parts per million higher than a year ago. The measurements were taken at Mauna Loa, a volcano in Hawaii.

这比一年前上升了2.4 ppm。这些观测是在夏威夷的莫纳罗亚火山进行的。

He was so busy figuring out how many parts per million of urine we'd be floating around in, he didn't even question it.

他肯定会忙着算我们泡在含百万分之多少的尿液里，没空起疑心。

AT NOON on May 4th the carbon-dioxide concentration in the atmosphere around the Mauna Loa Observatory in Hawaii hit 400 parts per million (ppm).

5月4号中午，夏威夷莫纳罗亚观测站测量到其附近大气层中，二氧化碳的浓度达到400ppm。

Look for levels less than 800 parts per million.

寻找低于百万分之 800 的水平。

That would be 400 parts per million lower than current levels.

这将比目前的水平低 400 ppm。

That the mean of our new engines is exactly 20 parts per million.

我们新引擎的平均值正好是百万分之二十。

So you can reverse the CO2 parts per million of the atmosphere and oceans.

所以你可以逆转大气和海洋中二氧化碳的百万分之一。

That the true mean for our new engines is below 20 parts per million.

我们新发动机的真实平均值低于百万分之二十。

It's just crossed 415 parts per million for the first time since humans came into existence.

自人类诞生以来，它首次超过百万分之 415。