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radiography
radiographer
radiograph
radiogram
radioactivity
radioisotope
radiologist
radiology
radish
radium
radius
radon
RAF
raffia
raffish
raffishly
raffishness
raffle
raft
rafter
raftered
rag
rag-and-bone man
rag-bag
ragamuffin
rage
ragged
raggedly
raggedness
raging
raglan
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radioisotope
/ 9reIdIEU5aIsEtEUp; 9redIo`aIsE9top/
n radioactive form of an element, used in medicine, industry, etc to study the path and speed of substances through bodies and objects 放射性同位素.
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