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英语词汇
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Organs
(器官)
口语挑战
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circulatory system
heart
vein
artery
blood vessels
capillaries
blood
nervous system
brain
spinal cord
nerve
respiratory system
trachea
lungs
diaphragm
urinary system
urine
bladder
kidney
循环系统
心
静脉
动脉
血管
毛细血管
血液
神经系统
脑
脊髓
神经
呼吸系统
气管
肺
隔膜
泌尿系统
尿
膀胱
肾