Caesium is a soft, silvery-gold metal that becomes liquid when stored in a warm room. It is mostly found in mineral deposits near a small lake in the wilds of central Canada. Its main commercial use is as an ingredient in drilling fluids for petroleum exploration. But thanks to quirks of chemistry and history, caesium is also the metronome of the world, the ultimate source of all modern time.
铯是一种柔软的银金色金属，在温暖的房间中会变成液体。它主要存在于加拿大中部荒野一个小湖附近的矿藏中。其主要商业用途是作为石油勘探中钻井液的成分。但由于化学和历史的特殊性，铯也是世界的节拍器，是所有现代时间的最终来源。
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