电工检查了跳闸的断路器，发现是短路引起的。

The electrician checked the tripped ___circuit-breaker and found it was caused by a short circuit.

由于市场暴跌，交易所启动了熔断机制以稳定投资者情绪。

The exchange triggered the ___circuit-breaker as the market plunged sharply to calm investor sentiment.

市长宣布实施为期两周的熔断措施以减缓疫情传播。

The mayor announced a two-week ___circuit-breaker measure to slow down the spread of the virus.