1、
He dipped his headlights as they came up behind a slow-moving van.
当他们靠近一辆缓慢行驶的货车时，他把汽车前灯调成了近光。
《柯林斯高阶英汉双解学习词典》
2、
The car's headlights were on full beam, ie not dipped to avoid dazzling other drivers.
那辆汽车的前大灯都开着(未能为防止将其他司机眼睛照花而放低前大灯).
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