Unaided observers can identify the Sea of Tranquility, Sea of Showers, and Sea of Vapors tonight. Enhanced viewing with binoculars reveals the Frozen Sea, Alphonsus Basin, and Clavius Basin. Through telescopic lenses, additional features become visible such as the Caucasus Range and the historic touchdown sites of Apollo 14 and 16 missions.
视觉损伤：视神经萎缩导致视力减退与视野缩窄，进程缓慢难以察觉，多在中晚期才被发现。
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For reads, the story is very similar. They’re supposed to happen through “Views”, which are the read-only equivalent to reducers. Since they acquire a reader lock on the global mutex, several views can run concurrently, but the database cannot be written to while views are executing. Just like reducers, views are arbitrary user code compiled to WebAssembly.
Visual documentation of Artemis II departure