Liu has taken part in three Olympic torch relays.
刘翔三次参加了火炬接力活动。
In early PLC, always have relays place, can use.
对早期的PLC，凡是有继电器的地方，都可采用。
In addition, there are many protective and control relays.
此外，还有许多保护继电器和控制继电器。
Customers in order to meet domestic market demand relays.
为了满足国内客户对继电器市场的需求。
The relays are the only true team events in track and field.
接力跑是在田径场上唯一的团队比赛。
The relays are the only true team events in track and field.
接力跑是在田径场上唯一的团队比赛。
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