例句與造句

1. The usual metals are sodium and mercury owing to their visible spectrum emission.
2. Although lightning has a broad-spectrum emission, its noise power increases with decreasing frequency.
3. She was subsequently recruited by Princeton University, where she worked as research assistant under Prof . John N . Bahcall at the Institute for Advanced Study on Hubble Space Telescope Data Analysis of Quasar Spectrum Emission.
4. It's difficult to find spectrum emission in a sentence. 用spectrum emission造句挺難的