serve no purpose

• 不中用

serve no purpose的用法和样例：

例句

1. "A science fiction cannot not be regarded as a mere entertainment, but in fact it tells the reader much more."
   "科幻小说不能简单地看成是供消遣的，而实际上它给读者展示更深刻的内容。"
2. It's no use grieving about past errors.
   为过去的错误懊悔不已是无济于事的。
3. "A science fiction cannot not be regarded as a mere entertainment, but in fact it tells the reader much more."
   "科幻小说不能简单地看成是供消遣的，而实际上它给读者展示更深刻的内容。"
4. All our persuasion was of no use.
   我们所有的劝告都无用。
5. My useless life can only break out in tunes without a purpose.
   我无用的生命只能放出无目的的歌声。