医生们随时待命，准备应对突发情况。

The doctors were on ___stand-by to handle any emergencies.

为了以防万一，我们准备了备用轮胎。

We have a ___stand-by tire ready just in case.

电视在待机状态下仍然会消耗少量电量。

The TV still uses a small amount of power in ___stand-by mode.

我作为候补乘客等了两个小时，终于等到了座位。

I waited for two hours as a ___stand-by and finally got a seat.