There are differences between actual measurement and visual inspection, so we shouldn't make judgments based on the data from visual inspections. 实测和目测是有差距的，我们不应根据目测的数据来作判断。
The names of the various lunar formations and lunar landscapes mostly date back to the early history of visual lunar observation. 各种月面结构物和地形的名称，大都起源于月球目测观测史的早期。
