All lights are blacked out during air defenceexercises.
在防空演习时对一切灯火都实行管制。
2
He would like to loosen Japan's constraints on "collective" self-defence that prevent both joint military exercises and the defence of Allies under fire.
他想放宽日本对于“集体”自卫的约束，因为这一约束阻止了联合军事演习(joint military exercise)并禁止日本在战争中对孟军进行防御。