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单词
atomic number 69
释义
atomic number 69
翻译
原子数69
英英释义
Noun
1. a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
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public attitude
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public-awareness
public awareness
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public bidding
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Public blood group antibody
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