俄罗斯宣布史上最大规模军事演习

unit – n. a thing, person or group that is part of something larger

uNPRecedented - adj. never been done before

course – n. pathway, direction

embrace – n. putting one's arms around another person

transparency – n. openness

brigade – n. part of a military division

battalion – n. a very large part of the army

infrastructure – n. the equipment and structures needed necessary for something to operate correctly

scale – n. a series of ordering or rating something