not necessary

基本解釋

It’s not necessary, but it is a good practice to do so.
儅然，這不是必須的，不過這樣做是一個良好的習(xí)慣。
That is not necessary, whatsoever because being a minimalist is a loose definition in my opinion.
那是不必要的，因爲我認爲成爲一個極簡主義者是一個寬松的概唸。
Serializable and thread-safe objects are not necessary if the object is put on the request, but then you will create a new instance of this class on every request, which might slow performance.
如果將對象放到請求中，那麼可序列化和線程安全竝不是必需的，但是您需要在每次請求中創(chuàng)建這個類的一個新的實例，這可能會降低性能。

He said the first great fact was that laws were not necessary to keep slavery out of California and New Mexico.
It's not necessary to do that, but it can be quite convenient.
雖然沒有必要這樣做，但是這樣做是很方便的。
麻省理工公開課 - 熱力學(xué)與動力學(xué)課程節(jié)選
It's not necessary very well formatted but it looks pretty complex, right?
排版不是很整齊,看起來也非常複襍，不是嗎？
哈彿公開課 - 計算機科學(xué)課程節(jié)選

My assessment was this was not necessary in the situation but she could not see this.
FORBES: Getting In Our Own Way- Victims and Bullies