多年来，艾伦和她的同事们一直研发加州地震早期预测系统，该系统将一些仪器安放在本州易发地震的断裂带上。

For years, Allen and colleagues have been developing an earthquake early-warning system in California, placing instruments in many of the state's fault lines.

youdao

多年来，艾伦和她的同事们一直研发加州地震早期预测系统，该系统将一些仪器安放在本州易发地震的断裂带上。

For years, Allen and colleagues have been developing an earthquake early-warning system in California, placing instruments in many of the state's fault lines.

youdao