thorny subject

It is an thorny problem how to choose proper words as the subject of a sentence in Chinese-English translation.

在汉英翻译过程中，怎样选择适当的词语作句子的主语往往是一个棘手的问题。

' meyer is very good on its creation, and on the thorny subject of the partition of the old raj in 1947.

迈耶非常了解巴基斯坦的出现，而且对于1947年印巴分治这个课题非常熟悉。

phil woolas told the times immigration became an "extremely thorny" subject when people were losing their jobs.

PhilWoolas告诉泰晤士报当国民都普遍失业的时候，移民变成了一个非常棘手的问题。

A conference later in the summer will bring experts in the field together to discuss the future of food. It's a thorny subject.

食品专家们将在这个夏季举行一次讨论有关未来食品的会议。食品问题是个棘手的问题。