yǎn xí / zhōng / zhǐ huī yuán / shì fàng / le / yān wù dàn / wèi / chè lí / de / duì wǔ / tí gōng / yǎn hù

演习中，指挥员释放了烟雾弹，为撤离的队伍提供掩护。

During the exercise, the commander released a smoke grenade to provide cover for the evacuating team.