Rescuers worked in relays to save the trapped miners.

救援人员轮班营救受困的矿工。

《牛津词典》

Both can be used in relays, integrated circuits, and small solenoid valves.

两者都可以用于继电器、集成电路以及小型的电磁阀中。

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Running in relays to tire prey or waiting in ambush while others chase prey toward it.

接替奔跑而使猎物疲劳，或等在埋伏处，让其他追捕猎物者向这边奔来。

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"Eight people at a time work in relays to carry the stretcher down the mountain with pathfinders checking the route, " said Mr Jones.

BBC: Wales snow: Rescuers' mountain walk equipment warning

This time, he's adding the 200-meter freestyle, a stroke he's performed in the past only in Olympic relays.

WSJ: Menu

Spitz won gold in the 100m and 200m freestyle, 100m and 200m butterfly and three relays in 1972 in Munich.

CNN: Phelps on course with third gold medal