(idiom) a matter of great importance or wide-reaching implications

the structure and organization of a nation's military forces

Sports or physical fitness training related to military knowledge and skills, such as parachuting or model aviation; often shortened to [[军体|軍體|jun1 ti3]].

(idiom) describes a matter that has a broad impact or involves serious consequences; often used as an excuse for being unable to solve a problem quickly

(idiom) This is no small thing; to have a serious matter at hand that involves many people or has a wide impact. Sometimes used as an excuse to delay or avoid solving a problem immediately.