必备 essential
necessary
indispensable
- 当然,在商店的时候,你也可以挑选一些其它必备的聚会用品。
Of course, while you are at the shop you can pick up some other necessary party supplies as well. - 直到最近,学习一门外语(如果你的母语为英语)还被认为是那些立志于翻译、教学、外交的必备技能。
Until recently, studying a foreign language (if you’re a native English speaker) was considered to be a necessity only for those going into the fields of translation, teaching or diplomacy. - 主耶稣说,这种小孩子的天性是进入天国的必备条件。
Jesus says this childlike nature is necessary to enter the kingdom of heaven.