semaphore signal 横杆信号 ; 臂板信号 ; 手旗信号 ; 臂板信号机
electric semaphore signal 电动臂板信号机
single wire semaphore signal 单线臂板信号机
double wire semaphore signal 双线臂板信号机
mechanically operated semaphore signal 机械臂板信号机 ; 坏臂板信号机
upper quadrant semaphore signal 上象限臂形号志
If the semaphore is not available, it's put to sleep; if a fatal signal is delivered to it, it would be removed from the waiters' list and would have to respond to the signal.
如果信号量不可用，它将被置为睡眠状态；如果向它传递了一个致命信号，则会将它从等待者列表中删除，并且需要响应此信号。
A semaphore is to your system what a traffic signal is to an intersection: a mechanism that keeps things running smoothly.
信号量对于系统的作用就像是十字路口的信号灯：一种保持系统运行顺畅的机制。
The oldest among July's 615 participants is pensioner Gwynneth Pedler, 83, from Oxford, who plans to signal with semaphore flags.
即将在七月份登场的年纪最大的参与者是83岁来自牛津的Gwynneth Pedler，她准备打旗语。
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