一听到发动机声响，就探出窗外，利用镜子的反射打出信号。

When he heard an engine, he leaned out the window and flashed a signal.

youdao

一听到发动机声响，就探出窗外，利用镜子的反射打出信号。

When he heard an engine, he leaned out the window and flashed a signal.

youdao