There are no necessary public services, such as rubbish collection.

这里没有必需的公共服务，如垃圾收集。

youdao

We must determine if a collection is really necessary or if we could replace the collection with one or more methods that will operate on the collection of objects through the database.

我们必须确定是否真的需要一个集合，或者是否可以用一个或多个通过数据库操作该对象集合的方法来代替该集合。

youdao

Entire cabinets are usually added to the bathroom to hold more, as her collection expands, and all the while she will swear that each item is necessary.

浴室里的整个柜子都是用来装她的东西的，塞得没有空间了还有东西要塞，并且还信誓旦旦地说哪一样都是必要的。

youdao

For sure, she has all the necessary ingredients: Mondelez is a collection of pantry staples, from Nabisco crackers to Oreo cookies to Cadbury chocolates.

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It also prohibits them from conditioning children's participation in activities on the collection of more personal information than is reasonably necessary for them to participate.

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