这是个老大难问题。
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。
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。
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。
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。
Which is the problem confronting the widow: how to survive that first year, how to turn into a perennial.
寡妇需要面对的问题是：如何度过第一年？如何变成一株多年生植物？
The problem of building things without an afterlife, and thus wasting resources and effort, is a perennial one for the Olympics.
建筑物如果无法再次使用就是浪费资源与人力，这是奥运长久以来都得面对的问题。
In the early days of browsers, a perennial and annoying problem was only being able to have one window open at a time.
在浏览器诞生之初，一个烦人的问题就是一次只能打开一个网页。
In the early days of browsers, a perennial and annoying problem was only being able to have one window open at a time.
在浏览器诞生之初，一个烦人的问题就是一次只能打开一个网页。
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