To combat cold weather birds ruffle their feathers trapping layers of warm air to insulate their bodies.
为了抵御寒冷天气，鸟儿们竖起羽毛，裹住一层层的暖气，使身体与外界隔绝。
We suggest a novel trap of trapping a neutral atom with static electric field of four point charges, and discuss the quantum effects of the cold neutral atom in the trap.
用四个点电荷构造一个简单、新颖的静电势阱，并基于含时薛定谔方程和有限差分时间域方法，研究冷原子在该势阱中的量子力学效应。
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