That would also allow the batteries of electric cars to serve as a backup supply of power when needed.
这也会将电动汽车的电池在需要时成为备用电源。
If the server incorporates a redundant power supply, the backup supply keeps the server running until a technician can replace the failed power supply.
如果服务器包含一个冗余电源、后备供应保持服务器运行，直到一个技术员能取代失败的电源。
Adding inventories and backup suppliers reduces risk by increasing the redundancy in a supply system. It is one way to enhance resilience, experts say, but there are others.
增加库存和备用供应通过提高供应系统的冗余来降低风险。专家说，这是提高应变能力的一种方法，但是还有其他方式。
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