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in vacuo adv.〔拉丁語〕 在空處,在真空中。

in vino veritas

According to phenomena observed during total solar eclipse , it can be pointed out that the velocity of gravitational field wave is equal to the velocity of light in vacuo 摘要據日全食時的現象能夠得出:在真空中,引力波的傳播速度和光波的傳播速度相等。

The mixture is then distilled in vacuo . 然后將混合物進行真空蒸餾。