单词	to guard a door
释义	守突to guard a gate to guard a door
随便看	secondary inductance secondary induction secondary industries secondary industry secondary industry s secondary inertia force secondary infection secondary information secondary injection secondary injury secondary injury--secondary lesion-- collateral injury secondary innovation secondary input secondary input port secondary insect secondary insiders secondary instrument secondary insulation secondary integument secondary intention secondary interference secondary interstice secondary investigation secondary ion secondary-ion angular distribution