chain command

例句：

1. 1. The chain command is a crucial part of the military strategy.
   链式命令是军事战略中至关重要的一部分。
2. 2.In this chain command system, each unit has its own responsibility and authority.
   在这个链式命令系统中，每个单位都有其自己的责任和权限。
3. 3. The chain command system helps to ensure that all units are working together effectively.
   链式命令系统有助于确保所有单位都能有效地协同工作。