宇宙速度
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Meanings
1
cosmic speed; escape velocity; orbital velocity
Technical term in physics and space engineering. Often used in compounds like 第一宇宙速度 (first cosmic velocity, i.e., orbital velocity) and 第二宇宙速度 (second cosmic velocity, i.e., escape velocity).
Cosmic velocities include the first cosmic velocity and the second cosmic velocity.
The rocket needs to reach the second cosmic velocity to escape Earth's gravity.