Aboard the LRO is a radar instrument primarily designed to hunt for water ice under the Moon's surface.

月球勘测轨道器上装有一台雷达仪器，主要用于寻找月球表面下的水冰。

That changed when the team compared the pictures with satellite images of Earth created using radar technology similar to the LRO's.

当研究小组将这些照片与使用类似于LRO的雷达技术创建的地球卫星图像进行比较时，情况发生了变化。

The team then ran simulations to compare the data from LRO with those expected from pits of varying shapes and sizes.

随后，研究小组进行了模拟，将 LRO 的数据与不同形状和大小的坑的预期数据进行比较。

The researchers discovered the annexe by analysing data from the Lunar Reconnaissance Orbiter (LRO), which has been circling the Moon since 2009.

研究人员通过分析自 2009 年以来一直在绕月运行的月球勘测轨道器 (LRO) 的数据发现了这个附属建筑。