the writes generated by a reorg, while not transactional writes, are still a necessary evil that must be added to the 「real」 write workload being transmitted across the link.
is obsolescence a problem that needs to be fixed, or a necessary evil of the technological world?
过时是否是个该解决的问题,或是技术世界中必需的罪恶呢?
if you want to get the entertainment off your files and disks and onto your screen, cables are a necessary evil for the time being.
如果你想把电影之类的娱乐节目从你的文件夹或硬盘中传输到屏幕上,线缆是种令人生厌但不得不用的东西。
while it can be tedious, it is a necessary evil of systems administration.
尽管它单调乏味、令人生厌,但它是系统管理所必需的。
best practices are a necessary evil that must be lived with but should not be allowed to hold them back.
最佳实践是一个必要的、讨厌的东西,但是专家不会拘泥于最佳实践。
appraisals no longer need to be viewed as a necessary evil but rather as a tool that can be used to enhance your career.
评估不是「必要的罪恶」,相反那是提升自己职业生涯的工具。
more fundamentally, they「ve turned screen time from a signal of geekiness, a job requirement or a necessary evil into a straightforward aspect of modern existence.