- beam wobble
- 光速: velocity of light a surname
- 摆动: swing; sway; oscillate; pend ...
- 快速摆动;扭动;弯曲线;波形: wiggle
- 光速: speed of light; velocity of light (光磁); light velocity; ray velocity 光速约为每秒30万公里。 the velocity of light is about 300,000 kilometres per second
- 加速摆: acceleration
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