relay

relay1
[ˈriːleɪ]
noun
  1. a group of people or animals engaged in a task or activity for a fixed period of time and then replaced by a similar group
    接替或替换的一组人（或动物）
    the wagons were pulled by relays of horses.
    货车由一组接一组的马匹轮流拉。
    gangs of workers were sent in relays.
    工人被分批轮流派出。
    ■[usu. as modifier]a race between teams of runners, each team member in turn covering part of the total distance
    接力赛
    a 550-metre relay race.
    550米接力赛。
  2. an electrical device, typically incorporating an electromagnet, which is activated by a current or signal in one circuit to open or close another circuit
    继电器，替续器
  3. a device to receive, reinforce, and retransmit a broadcast or programme
    （接收、加强并转播无线电或电视广播节目的）中继设备
    ■a message or programme transmitted by such a device
    中继转播的信息（或节目）
    a relay of a performance live from the concert hall.
    从音乐厅现场通过中继站实况转播的表演。
verb
  1. [with obj.]receive and pass on (information or a message)
    转达信息，转告（消息）
    she intended to relay everything she had learned.
    她打算把她知道的东西都传授出来。
    ■broadcast (something) by passing signals received from elsewhere through a transmitting station
    转播；中继转发
    the speech was relayed live from the palace.
    演讲从宫殿现场经过中继站实况转播。
语源
  1. late Middle English (referring to the provision of fresh hounds on the track of a deer): from Old French relai (noun), relayer (verb), based on Latin laxare 'slacken'
relay2
[riːˈleɪ]
(past and past participle relaid)
  1. [with obj.]lay again or differently
    重新铺设，再铺设
    they plan to relay about half a mile of the track.
    他们计划重新铺设约半英里距离的轨道。
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