高压管是放射材料的第三道防护。

The pressure vessel is the third barrier to radioactive material release.

youdao

很明显，我们想要保持放射线材料，不在我们的环境或者生物圈里，那基本上就是进入容量，完整性的保持。

Obviously we wanna keep the radioactive material out of our environment or biosphere which basically gets into the maintenance of containment integrity.

youdao

“异常”也可能意味着核设施的某个安全问题本可能造成更大的破坏，但结果并未造成严重后果；或是放射性材料被盗，或被不当运输。

An "anomaly" can also mean that a safety problem at a facility could have resulted in greater damage than it did or that radioactive material has been stolen or transported incorrectly.

youdao

As carefully as people work with radioactivity here, and using often much, much safer radioactive materials than radium bromide, and using them, and special hoods, and having special procedures, they still do a lot of checking with these Geiger counters to make sure everything's safe.

虽然在这里人们,用放射性物质都非常的小心，而且通常用的材料放射性,都比溴化镭要小得多，并且用的时候,都用特殊的容器,特殊的操作过程,但我们平时仍会用。

麻省理工公开课 - 化学原理课程节选

We have 266 ping-pong balls, and we need someone, hopefully you, to be some radioactive material that are going to be emitting these ping-pong balls. And when the time comes, in just a minute, I'll ask the TAs to come down and hand these out very quickly to you, so we can do this experiment.

你们有些人那天，看到我在办公室数乒乓球，我们需要几个人,希望是你,来作为放射材料，放射这些乒乓球,等会我会让助教,把这些球发给你们。

麻省理工公开课 - 化学原理课程节选