When disasters occur can matter as much to the economy as how bad they are.

大灾难何时发生，与其自身的严重程度一样对经济有同等的影响力。

youdao

HADR provides an excellent solution for minimizing the impact on a database environment when hardware, network, or software malfunctions or natural disasters occur.

HADR可以在发生硬件、网络或软件故障或者自然灾害时，尽可能减少对数据库环境的影响。

youdao

These essential needs must also be met when emergencies or disasters occur.

这些基本需求也必须在发生紧急情况或灾难时得到满足。

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Disasters are not natural, they only occur when people lack preparedness or the ability to cope with hazards: it is the combination of an exposed and ill-prepared population or community with a hazard event that results in a disaster.

UNESCO: Education

And when combined with the already-existing complexity of technology and business, disasters can occur.

FORBES: Let's Not Compound Complexity