n.（木板等的）节孔...

Duty: Responsible for development and test of power and power knothole.职责: 承担电源和电源分配板的开发与测试....

knothole的音标：knothole的英式发音音标为：['nɒthəʊl]knothole的美式发音音标为：['nɒtˌhoʊl]...