adjective🔗Share同心的，共心的 Having a common center."The layers of the onion are concentric, each one smaller than the last. "洋葱的每一层都是同心的，一层比一层小。mathspacefigureChat with AIVocabulary GamePractice Reading
adjective🔗Share向心, 收缩的 (of a motion) in the direction of contraction of a muscle. (E.g. extension of the lower arm via the elbow joint while contracting the triceps and other elbow extensor muscles; closing of the jaw while flexing the masseter)."During a bicep curl, the concentric phase of the movement occurs as you lift the weight, shortening the bicep muscle. "在做肱二头肌弯举时，向心阶段发生在举起重量的过程中，此时肱二头肌会缩短。physiologyanatomybodymedicinefunctionChat with AIVocabulary GamePractice Reading
