mean carrier frequency

例句：

1. 1. The meaning of life is to find your purpose in life.
   生命的意义在于找到生活的目的。
2. 2. The meaning of success is to achieve your goals and dreams.
   成功的意义在于实现你的目标和梦想。
3. 3. The meaning of love is to be kind and compassionate towards others.
   爱的意义在于对他人充满善意和同情。