But the key difference is mantis shrimps are able to do this across the whole spectrum of light, whereas DVD or CD players have a much narrower band to work with.
而二者的主要区别在于，螳螂虾能够转换整个光谱的光，而DVD机或CD机只能转换很窄波段中的光。
2
Perhaps you want to make a CD or join a band and play at some local venues.
您可能希望在一张CD或加入一个乐队，玩一些本地的场地。
3
If you're giving a present to someone you were at school with as a child, how about a CD of a band that was popular at the time?