词汇	attack and defense exercise
释义	attack and defense exercise 攻防演练
随便看	secondary system security protection secondary table secondary tail secondary tailings secondary tar secondary target secondary task secondary taste Secondary taste disorder Secondary Taste Disorders secondary teacher secondary teacher preparation secondary teachers secondary teachers convention secondary teachers school Secondary Technical Education secondary technical school secondary-technical-school chemisty teaching Secondary Technical School/ Polytechnic Schoo Secondary Technical Schools Secondary technical school students Secondary Technological School secondary tectonic overlap secondary tectonite secondary teeth