problematic adj.
释义：involving problems and difficult to deal with
Problematic 的字面意思是“有问题的”，不过常常可以在不同场景中灵活翻译，比如“困难重重” “难以处理”，是一个我们熟悉但是想不起来用的小词。
例① 在北京开车很容易出现各种各样的问题，比如交通堵塞、停车等，我们这时就可以用 problematic 来吐槽：
Driving in Beijing can be quite problematic.
例② 对许多学习者来说，最大的语言问题是词汇量不足。
Acquiring an adequate vocabulary has been highly problematic for most learners.
某个问题依然存在，我们除了用“remain a problem”外，还可以用 remain problematic。
例③ 共享出行依然有许多问题。
Ride-sharing services remain problematic.
例④《经济学人》中也会经常出现 problematic，比如在提到中国的人口政策时，它说：
A population-planning document released last year acknowledged that the low birth rate was problematic.
例⑤ 在提到美国对科技公司的监管时也用到了 problematic：
For firms with free products, such as Facebook and Google, such regulation could prove problematic.
1. 翻译：对中国学生来说，英语中的双元音（diphthong）很难掌握。
English diphthongs are quite problematic for Chinese students.
（参考翻译：English diphthongs are particularly problematic for Chinese students to master.）
2.造句练习:
场景: 中国的教育体系依然存在很多问题。
造句: China's education system remains problematic.
