1. Special safety concepts signalise a beginning failure of the leakproof operation. 当无泄露操作开始出现故障时，非凡的安全装置会有报警信号发出。
2. Special safety concepts signalise a beginning failure of the leakproof operation. 当无泄露操作开始出现故障时，特殊的安全装置会有报警信号发出。
3. The greatest piece of luck had come to him, and so simply, without noise, or flourish, or display to signalise it. 最大的幸福实现了——而且是那么简单，无声无色、毫无颂扬地实现了。
英英解释
v.
1. provide with traffic signals
2. communicate silently and non-verbally by signals or signs
3. point out carefully and clearly
4. make conspicuous or noteworthy
