Security is a difficult but necessary proposition for any application.

对于任何应用程序，安全是一个困难但必要的命题。

youdao

You aren't being stupid, but you aren't assuming too much either — a difficult but necessary balance.

没人说您笨，但是您也不用假想得太多——权衡起来是有点困难，但这是必需的。

youdao

It would be difficult but necessary to put myself out of the comfort zone to communicate and socialize with other people, in order to learn more.

把自己推出舒适带去和各色的人交往是一个困难的过程，但对于学习和社交是必要的。

youdao

"It has been a difficult but necessary decision, " said a club statement.

BBC: SPORT | Football | My Club | Crawley Town | Crawley chairman Majeed bows out

The removal of the Royal Navy's former flagship from service in 2011, five years early, was a "difficult but necessary decision", the MoD has said.

BBC: HMS Ark Royal sold for scrap by Ministry of Defence

Difficult but necessary spending cuts were put off for another day.

FORBES: Move up http://i.forbesimg.com t Move down