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penetration noun

  /pɛnɪˈtɹeɪʃ(ə)n/
  • The act of penetrating something. [from 15th c.]
 浸透, 貫通

penetrate verb

  /ˈpɛnətɹeɪt/ , /ˈpɛnɪtɹeɪt/
  • To enter into; to make way into the interior of; to pierce.
 突き通る, 貫通
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