例句與造句

1. Sum bands are more commonly observed than difference bands in vibrational spectra
2. A difference transition, or difference band, occurs between excited states of two different vibrations.
3. Since the initial state of a difference band is always an excited state, difference bands are necessarily " hot bands ".
4. Since the initial state of a difference band is always an excited state, difference bands are necessarily " hot bands ".
5. However the term " difference band " also applies to cases where more than one quantum is transferred, such as 100 ?! 020.
6. It's difficult to find difference band in a sentence. 用difference band造句挺難的
7. For difference bands involving transfer of a single quantum of excitation, as in the example, the frequency is approximately equal to the difference between the fundamental frequencies.