march unit

例句：

1. 1. The army hasa large number of march units for trainingpurposes.
   军队拥有大量的行军单位用于训练目的。
2. 2. The company's march unit isresponsible for the safety of all personnel.
   公司的行军单位负责所有人员的安全。
3. 3. The marchunit was formed to support the military operationin the region.
   该行军单位成立是为了支持该地区的军事行动。