Because of quantum wave nature, cold atoms tunneling through a laser beam can obviously have a completely different feature from that of a classical particle (hot atom).

量子力学波动性使得冷原子穿越一个激光束时明显地展现出与经典粒子(热原子)不同的结果。

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At least 26 people have died in a cold wave sweeping through northern India, the country's state broadcaster Doordarshan News says.

印度国家广播电视台全印新闻称，席卷北部地区的寒潮造成至少26人死亡。

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In neighbouring Uttar Pradesh, the authorities have closed all schools for a week after a cold wave claimed the lives of 104 people.

BBC: India cold snap kills hundreds