large-scale optical telescope, 大型光學望遠鏡, Yang Liwei, 楊利偉, former Soviet Union, 前蘇聯, space explorations, 太空探索, Yuri Gagarin, 尤里加加林, air cushion, 氣墊, propellant, 推進劑/發射劑, thrust, 推力.

Leaderboard

See top players

Leaderboard

Visual style

Options

Switch template

Leaderboard

See top players
)
Continue editing: ?