The traffic light changed to green, giving the signal to go.
交通灯变成了绿色，发出了可以走的信号。
He raised his hand as a signal for everyone to stop talking.
他举起手，作为让大家停止说话的信号。
The sudden rainstorm was a signal to take shelter immediately.
突如其来的暴雨是立即寻找避难所的信号。
The loud horn served as a signal that the train was approaching.
刺耳的喇叭声是火车即将到来的信号。
The flickering lights were a signal that there was a power issue.
闪烁的灯光是电力问题的信号。
He waved his arm as a signal for help from the rescue team.
他挥动手臂，向救援队发出求助的信号。
The referee blew the whistle as a signal to end the game.
裁判吹哨，作为结束比赛的信号。
The alarm clock gave a loud signal to wake up.
闹钟发出了响亮的声音，作为醒来的信号。
The dog barked loudly as a signal of danger nearby.
狗大声吠叫，表示附近有危险的信号。
The teacher clapped her hands as a signal to gather the students.
老师拍手，作为召集学生的信号。
electrical signal
电信号
turn signal
转弯示向灯；转向灯
time signal
报时信号
distress signal
遇难信号
smoke signal
烟雾信号；标记；征兆
复数: signals;
第三人称单数: signals;
过去式: signalled;
过去分词: signalled;
现在分词: signalling;
副词: signally;
