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Jyutping sam1 fai3
Pinyin xīn fèi

Definitions (Wiktionary)
  1. noun, figuratively
    heart; inner thoughts; emotions
  2. noun
    heart and lung
  3. noun, figuratively
    conscience
  4. adj, attributive
    cardiopulmonary
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    你应该去上婴儿心肺复苏课程。
    你應該去上嬰兒心肺復甦課程。
    nǐ yīng gāi qù shàng yīng ér xīn fèi fù sū kè chéng 。
    • You should really take an infant CPR class.