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to phrases
天然放射性本底
tiānrán fàngshèxìng běndǐ
met.
natural radiation background
sport., med.
natural radioactive background
tech.
natural radioactivity background
天然放射性本底【核】
tiānrán fàngshèxìng běndǐ
el.
natural radioactivity background
天 然放射性本底
:
3 phrases
in 3 subjects
Chemistry
1
Nuclear physics
1
Technology
1
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