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propagation
英/pɹˌɒpɐɡˈeɪʃən/
美/ˌpɹɑpəˈɡeɪʃən/
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01n.
增殖, 繁殖, 宣传
the spreading of something (a belief or practice) into new regions; the movement of a wave through a medium
02n.
WORD BY WORD
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the spreading of something (a belief or practice) into new regions; the movement of a wave through a medium