determine the speed of light how high a mountain is测定: determine; determination; se ...光速: velocity of light a surname定光: f=fixed; fixed light; sadamitsu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自记式感光测定光度计: recording sensitophoto meter下载手机词典可随时随地查词查翻译
