以下为句子列表：
英文: One of these missions, a satellite called Aeronomy of Ice in the Mesosphere, or AIM, was launched in April to study so-called noctilucent clouds (depicted above), the highest layer of clouds in the atmosphere.
中文: 任务其一，今年4月该局发射了一颗名为“中层大气高空冰探测”（简称AIM）的卫星以研究所谓的夜光云（如上图所示）－这是大气层中最高处的云层。
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