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Correct

镭

/ léi /

Strokes

Definition

radium (chemistry)

Example

As a Noun

radium (Ra)

1

Léi

镭

tóngwèisù

同位素

Pinyin
Sentence

radium isotope

2

Léihuà

镭化

héwù

合物

Pinyin
Sentence

radium compound

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