stand by service

• 备用

stand by service的用法和样例：

例句

1. We should keep a spare fuse handy by the fuse box.
   我们应该将一根备用保险丝放在保险丝盒旁边。
2. Mr.Tandja has responded by assuming sweeping emergency powers.
   坦贾通过准备备用力量对此进行回应。