non-essential

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌnon-esˈsential adjective  NEED#not completely necessary 非必要的，非必需的 All non-essential travel was cancelled. 所有非必要的旅行都被取消了。

Examples from the Corpus

non-essential• Some firms will be told to sell off non-essential assets to cut their debt.• Metrolink is seen by transport planners and environmentalists as the first serious attempt to squeeze non-essential car users out of Manchester city centre.• Items such as computers and video recorders and cameras were until recently in the non-essential category.• For a developing country in particular this might be a desirable outcome in the case of non-essential goods.• For the working owner, non-essential grooming is out.• The till girl drops a few non-essential items, like initialled and scented toilet paper into a reject box.• Those opposed to whaling focus on its inherent cruelty, the non-essential nature of whale products, and the danger of over-exploitation.• Use what detail you need and filter out the non-essential stuff.

ˌnon-esˈsential adjectiveChineseSyllable  

Corpus not completely necessary

non-essential
ˌnon-esˈsential adjective
not completely necessary:
    All non-essential travel was cancelled.

non-essentialBrE /ˌnɒn ɪˈsenʃl/ 🔊NAmE /ˌnɑːn ɪˈsenʃl/ 🔊 adjective [usually before noun] not completely necessary 非必需的；不重要的  ➡  compare essential adjective (1) HELP This is not as strong as inessential and is more common. Inessential can suggest disapproval. 不如 inessential 语气强，但较常用。inessential 有不赞成的意思。▸ non-essential noun [usually plural] ◆I have no money for non-essentials. 我没有钱应付那些非必要的花费。🔊🔊