众议院美国与中国共产党战略竞争特设委员会本星期举行听证会，呼吁美国紧急采取行动，打破中国对稀土矿物的垄断。该特设委员会主席形容中国将其对稀土供应链的垄断武器化，他呼吁美国行政当局、国会和业界迅速采取行动，卸了这支“上了膛的枪”。

BEIJING, Nov. 20 (Xinhua) -- A research team has found a way to make certain rare earth materials, known for their bright and stable light, emit light when powered directly by electricity.