node

n 1 (botany 植) (a) knob on a root or branch （根或枝上的）瘤, 节. (b) point on the stem of a plant where a leaf or bud grows out 茎节（长叶或发芽的部位）. 2 hard swelling, eg on a joint in the human body 硬结（如生於人体关结处的）. 3 (physics 物) point or line in a vibrating body that remains still （物理）波节（振动体的静止点或线）. 4 (mathematics 数) point at which a curve crosses itself （数学）结点（曲线本身的交点）; 叉点.

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