小组发现，在磁场之中，原子的方向以特殊的方式发生的变化，而这种变化可以被穿过原子云的光束探测到。
In the presence of a magnetic field, the atoms' orientation changed in a particular way, and this change was detectable in the light that came through the atom cloud, the team found.
MOT的主要部份是六道雷射光束所形成的阵列，从上下四方照射在原子云上。
An essential element of a MOT is an array of six laser beams that bathe the atoms on all sides and from above and below.
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