N-COUNT
先驱;先行者;预兆
If you describe a person or thing as the forerunner of someone or something similar, you mean they existed before them and either influenced their development or were a sign of what was going to happen.
例句
...a machine which, in some respects, was the forerunner of the modern helicopter...
在某些方面成为现代直升机前身的机器
Some respiratory symptoms can be the forerunners of asthma.
一些呼吸道症状可能是哮喘病的先兆。