| 词汇 | pectoral |
| 词根词缀 | 词源： pectoral (adj.) 1578, "pertaining to the breast," from L. pectoralis "of the breast," from pectus (gen. pectoris) "breast, chest." The noun, short for pectoral muscle, is attested from 1758. Slang noun pec is first recorded 1966. |
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