breaker card

例句：

1. 1.This is a breaker card for the new software update.
   这是新软件更新的破折号卡片。
2. 2.The breaker card is used to indicate that the speaker has finished speaking.
   破折号卡片用于表示发言者已经结束发言。
3. 3. The breaker card was designed to prevent accidental activation of the device.
   破折号卡片被设计用来防止设备意外激活。