JPA many to many - do I have to remove \ add from both collection sets?

我不得不删除\添加从收藏集做JPA的多对多吗？

youdao

If an object is reference rich, it puts pressure on both allocation and collection.

如果一个对象引用了太多其他对象，它给分配和收集都增加了压力。

youdao

Straifford President George Friedman says he sees the online world as a kind of mutually reinforcing tool for both information collection and distribution, a spymaster's dream.

该公司的总裁乔治·弗莱德曼说，他把网络世界视为情报收集和情报发布两方面相互增强的工具，这是超级间谍们的梦想。

youdao

Her "Good Woman: Poems and a Memoir" and her collection "Next: New Poems" were both nominated for Pulitzer Prizes in nineteen eighty-seven.

VOA: special.2010.04.18

It's an excellent textbook; it's an excellent collection, and you should get them both.

这是一本非常经典的教材,当然读本也同样精彩,要求大家两本书都有

耶鲁公开课 - 心理学导论课程节选

"The Purdue Online Writing Lab is a sizeable collection of workshops,worksheets, instructional materials in both English language and in various genres in which students and people working in the world are expected to write."

VOA: special.2010.02.11

He said improvements in both data collection methods and the quality of the data meant the figures published this year should not be compared directly to last year's.

BBC: RELATED BBC SITES

The National Museum of African Art contains an excellent, if West Africa-heavy, collection of both traditional and modern art from the continent.

BBC: Lonely Planet's top five ways to capitalise your time in DC

And the collection of both interviews and other papers that she'd made sat around until it was taken--it was acquired by a private collector in the 1990s.

NPR: 'With Billie': A Jazz Great, As Others Saw Her