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Kepler edited 7 days ago
American law International Traffic in Arms Regulations, commonly known as ITAR, prohibits the export of strategic materials and their technologies. Rocket technology belongs to ballistic...

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Kepler edited 7 days ago
Mass parachute landing on Mars is completely feasible, but not economical (soft landing without reverse thrust is not yet possible). Americans have advanced core technologies, and China has...

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Kepler edited 7 days ago
The size of the impacted twin. 1. What kind of asteroid is this? Dimorphos is a small moon of an asteroid discovered in 2003, with a diameter of 170 meters, it is one of the smallest objects to be...
Kepler edited 7 days ago
The current element system is still far from perfect, it just completes the reaction system, but it doesn't have all the teams. Fire c hangs water and evaporates. Grandpa, Yan Fei, Xiangling, and...

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Kepler edited 7 days ago
What is blockchain? Blockchain is functionally a distributed ledger, so what is a distributed ledger? Let's take a look at the following three points. Let’s look at the first point. The ledger...