a Gordian knot

常见例句

The Israelis and Palestinians are in a conflict which is a Gordian knot that may not be resolved for a long time.
以色列和巴勒斯坦之間的鬭爭是個難解的問題，長時間都難以解決。
On the one hand, POS study is always a Gordian knot to Chinese linguists ever since the beginning of Modern Chinese Linguistics.
首先，從漢語語言學研究的角度看，詞類問題也一直是一個老大難問題。
This learns a territory in culture and education of domestic and international language, all along is one compares an a Gordian knot.
這在國內外語文教學領域，曏來都是一個比較棘手的新問題。

It is a Gordian knot the Chinese state has only begun to unpick.
ECONOMIST: A $45 billion shot in the arm The
This is necessary to deal with the myriad insurance billing schemes that can best be described as a Gordian Knot designed by Rube Goldberg.
FORBES: The Marcus Welby/Steve Jobs Solution to the Medicaid-driven State & County Budget Crisis
This is a real Gordian Knot.
FORBES: $6.2 Trillion of Unintended Federal Budget Consequences for Commercial Real Estate