Balancing the firstorder reciprocating inertial force through single-axis balance mechanism can evidently reduce the engine vibration. 摘要采用單軸平衡機構完全平衡一階往復慣性力，可大大減輕發動機振動。
Inertia force and moments of flapping wing in insect flight were studied using the methods of theoretical modeling and simulation. 摘要用理論?；头抡嬖囼炏嘟Y合的方法，研究了昆蟲翅膀撲動產生的慣性力和慣性力矩。
The lateral force should act perpendicular to the measuring axis at the point where force is introduced. 側力應垂直作用在力引入點的軸上。
