N-COUNT 先驱;先行者;预兆 If you describe a person or thing as the forerunnerof 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. 先驱;先行者;预兆
...a machine which, in some respects, was the forerunner of the modern helicopter. [+ of]
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.