1. 波长
    A wavelength is the distance between a part of a wave of energy such as light or sound and the next similar part.

wavelength

    e.g. Sunlight consists of different wavelengths of radiation...
           阳光由几种不同波长的射线组成。
    e.g. Blue light has a shorter wavelength than red.
           蓝光的波长比红光的短。

2. 广播波段
    A wavelength is the size of radio wave which a particular radio station uses to broadcast its programmes.

wavelength的反义词

    e.g. She found the wavelength of their broadcasts, and left the radio tuned to their station.
           她找到了他们的广播波段，把收音机调到那个位置收听他们电台的节目。

3. 志趣相投;观点一致
    If two people are on the same wavelength, they find it easy to understand each other and they tend to agree, because they share similar interests or opinions.

    e.g. It's great to work with people who are on the same wavelength.
           与志同道合的人一起工作真是太棒了。