A well-developed crisis management manual should be supplemented with regular drills.

紧急应变手册必须辅以定期演习，才能发挥最大的效用。

youdao

A well-developed crisis management manual should be supplemented with regular drills.

紧急应变手册必须辅以定期演习，才能发挥最大的效用。

youdao