radioactive material

基本解釋

But it depends on the depth of the radioactive material.
但是這取決於放射性物質(zhì)的厚度。
Professor Bushberg says removing the topsoil might make the land safe for use. But it depends on the depth of the radioactive material.
佈希柏格教授說，移除表層土壤可以保証土地的使用安全，但這取決於放射性物質(zhì)滲入的深度。
Once you start damaging the core, you are then releasing radioactive material into the coolant and thereby increasing the chances that something travels outside the reactor.
一旦你開始破壞核心，你就會曏冷卻劑中釋放放射性物質(zhì)，從而提高了這些物質(zhì)泄露到反應(yīng)堆外的危險。

But it depends on the depth of the radioactive material.
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.
你們有些人那天，看到我在辦公室數(shù)乒乓球，我們需要幾個人,希望是你,來作爲(wèi)放射材料，放射這些乒乓球,等會我會讓助教,把這些球發(fā)給你們。
麻省理工公開課 - 化學(xué)原理課程節(jié)選
So,yes,there is a threat particularly of the use of radioactive material, although we have no specific evidence indicating any capability at this time."

In fact, standards for NORM (naturally occurring radioactive material) have been observed for years.
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