{Object.keys(this.props.appearanceNode).map(key => (
              <Form.Item {...formItemLayout} key={key}>
                <div key={key}>{this.props.appearanceNode[key]}        
                      </div>
              </Form.Item>
            ))}    
this.props.appearanceNode 为一个对象, key 为循环的对象的每一项key 值 ,
{this.props.appearanceNode[key]}为key值对应的value 值

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