the action of bending or the condition of being bent, especially the bending of a limb or joint
(尤指四肢、关节)弯曲,弯曲状态
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flexion of the fingers 手指的弯曲
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[count noun]
these protozoans can move by body flexions. 这些原生动物可通过曲身移动。
"early 17th cent.: from Latin