In order to make sure the magnetic field distribution around the magneto optical trap cold atoms, the weak variation and distribution around the zero point magnet field can be analyzed.

为了研究磁光阱冷原子团所在区域的磁场大小，从而得出磁场零点附近磁场的微弱变化及其分布。

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It controlled a trap door between the boxes and allowed only fast-moving (ie, hot) molecules through in one direction and only slow-moving (ie, cold) ones through in the other.

侏儒控制着两个盒子间的活动门，仅允许快速移动(热)的分子朝同一方向通过活动门，慢速移动(冷)的分子朝相反方向通过另一扇活动门。

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But without a thick atmosphere to trap heat, it is possible that permanently Shadowed regions could stay cold enough to preserve ices for millions, if not billions, of years.

但是如果不是水星上厚厚的大气层留住了热量，那些永久背光的地区很可能有积存了几百万或是几十亿年的冰存在的。

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Many superlative vintages come from Colchagua Valley, where the high mountains trap the warm air in and keep cold Pacific air out.

BBC: Living in: wine regions