boost the morale; bestir the troops to better morale; enhance the morale of the troops (through some emotional appeal)
Related Translations:
激扬: 1.(激浊扬清) drain away the mud and bring in fresh water; drive out evil and usher in good2.(激励使振作起来) encourage; urge
士气: morale 短语和例子鼓舞士气 boost morale; 保持旺盛的士气 keep up the morale; 激励军队的士气 stimulate the army morale; 增强士气 stiffen the morale; 那次惨败动摇了这支部队的士气。 the terrible defeat has shaken the army morale.; 士气研究