- The long bone of the arm or forelimb, extending from the shoulder to the elbow.肱骨：臂或前肢的长骨，从肩部沿至肘部
- Latin [upper arm] 拉丁语 [上臂]
- natural childbirth
- natural food
- natural gas
- natural hat trick
- natural history
- naturalism
- naturalisms
- naturalist
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- natural killer cell
- natural language
- natural law
- natural logarithm
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- natural number
- natural philosophy
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- natural science