单词

radioactive

读音

ˌreɪdiəʊˈæktɪv

美式 ˌreɪdioʊˈæktɪv

英式 ˌreɪdiəʊˈæktɪv

词根

\-Radio- 是词根，源自拉丁词 "radius"，意为“射线”。-Active- 源自拉丁词 "activus"，意为“活跃的”。所以，"radioactive" 从词根上理解，意为“发出射线的”，即放射性的。

释义

["adj. [核] 放射性的；有辐射的"]

例句

Radioactive water had seeped into underground reservoirs.

放射性水已渗入了地下蓄水池。

The waste is safely locked away until it is no longer radioactive.

废料被安全地封存，直到其不再有辐射。

They were exposed to radioactive fallout during nuclear weapons tests.

他们在核武器试验过程中暴露于放射性核辐射。

强化记忆

为了帮助你记住这个词，你可以将它分成两部分来记忆：-Radio- 和 -Active-，并联系其单词词根，“发出射线的、活跃的”。

看视频学发音

and it has a heat exchanger from the hot salt,the radioactive salt, to a cold salt which isn't radioactive.It's still thermally hot but it's not radioactive.

which is also not universally accepted as clean energy because of the risks,because of radioactive waste.Can you make the case, briefly, but can you make your case for nuclear?

to produce the most dangerous long-term effect of a nuclear detonation:radioactive particles called fallout.These sand-sized particles emit ionizing radiation,

of their intellect,but thankfully no radioactive spiders.But with great power

One scan is comparable to what you’re exposed to over two or three yearsfrom natural radioactive sources, like radon gas;or the amount a pilot would rack up

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