Then the rain came and the red flag went up to signal a halt.
当时，雨下了起来，红旗被升起，发出停止的信号。
He pressed the red alarm signal to see if it was on or off.
他按了一下红色报警信号钮，检查一下它是开着的还是关着的。
On (RED) - wireless camera is transmitting with a poor signal.
上(红色)-无线摄像机是转递较差的信号。
When we are driving, and we see red signal, we often are more alert.
当我们开车，看到红色的信号时，总会提高警觉。
The Signal line: If we take short positions this line has to be red.
信号线：如果我们持有做空的头寸，这条线应该是红的。
A red light is usually a signal of danger.
红灯通常是危险的信号。
Stop when the signal light is red.
信号灯是红色时就停下来。
A red light is a signal of danger.
红灯是危险的信号。
The railway signal was on red, so the train stopped.
铁路的红信号灯亮了，所以火车停下了。
A red lamp is often a danger signal.
红灯常常是危险的信号。
A red light is usually a signal of danger.
红灯通常是危险信号。
The signal values are standard, meaning green, yellow, and red light.
信号值是标准，这意味着绿色，黄色和红色光。
The red signal means you can shoot.
红色信号表示可以射击。
为什么停车信号要用红色？
The railway signal was on red , so the train stopped.
①铁路的红信号灯亮了，所以火车停下了。
A red signal is often used as a danger signal.
红灯常常被当作危险的信号。
A red signal is often used as a danger signal.
红灯常常被当作危险的信号。
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