单词：signalled
音标：['sɪgnəld] ；
v. 发信号, 用信号传达, 用信号通讯( signal的过去式和过去分词 ); 发暗号; 示意
v communicate silently and non-verbally by signals or signs
v be a signal for or a symptom of
v be a signal for or a symptom of
signalled的用法和样例：
例句
- In digital signal technique, a signal that uses a positive(or negative) excursion and ground as the two binary signal states.在数字信号技术中，用正(或负)向电压与地两个电平来表示二进制“1”和“0”的一种信号
- A police car drew alongside and signalled to me to stop.一辆警车开到我身边示意我停下来。
- The defeat signalled the end of the war.那一次失败标志着战争的结束。
- Heavy footsteps signalled the teacher's approach.沉重的脚步声显示教师已经走近了。