| |||
spectral line | |||
spectrum line | |||
| |||
one of the lines of the Balmer series in the hydrogen spectrum | |||
| |||
one of the lines of the Balmer series in the hydrogen spectrum | |||
| |||
spectral line; spectrum line | |||
| |||
one of the lines of the Balmer series in the hydrogen spectrum | |||
| |||
one of the lines of the Balmer series in the hydrogen spectrum |
谱线 : 815 phrases in 48 subjects |