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1·This is a perennial problem.

这是个老大难问题。

2·The perennial problem is Europe.

反复出问题的是欧洲。

3·Our perennial problem is not having enough money.

长期困扰我们的问题就是缺钱。

4·It is the perennial problem with beautiful bouquets.

让鲜花保持盛开似乎是一个永远待解决的问题。

5·The World Cup is every four years, so it's going to be a perennial problem.

世界杯四年一届，所以这将是一个长期的问题。

6·Given the rapid staff turnover at investment Banks, keeping the firms' culture carriers on board is a perennial problem.

考虑到投行中快速的人员流动，要想让公司保持统一的风格是一个棘手的问题。

7·Will the perennial problem of so-called national caveats prevent some countries from getting involved in dirtier, more dangerous work?

所谓的“国家警告”这一长期存在的难题会阻止某些国家介入一个更为肮脏、更为危险的工作吗？

8·In the book he sets out and defines some of the perennial problems of philosophy, including the problem of evil, free will and determinism, the nature of justice and of virtue.

在这本著作中，他对一些哲学里常年不衰的问题进行阐述并给出了自己的定义，包括罪恶、自由意志和决定论，正义和美德的性质等问题。

9·Readers do not need to remember to take their books back on time - a perennial problem for many consumers, because the digital book automatically deletes itself from their machine after 14 days.

读者不再需要担心忘记准时还书了——这是许多顾客的困扰，因为电子图书会在14天后自动将自己删除。

10·Meanwhile, regarding the problem of coaxing plants to allocate more carbon to their root systems, Jansson says an important difference between perennial and annual plants is a good place to start.

同时，问题是可考虑哄骗植物分配更多的碳到根系，简颂指出多年生和一年生植物间的关键差异是一个良好的起动点。