Mountain weather is notoriously difficult to predict.

山地气候难以预料是人所共知的。

《牛津词典》

It is notoriously difficult to teach adults skills that do not have an immediate impact on their everyday lives, and many literacy campaigns in other countries have been much less successful.

众所周知，教成年人一些对他们日常生活没有直接影响的技能是非常困难的，而其他国家的许多扫盲运动都远远没有我们这么成功。

youdao

Timing, however, is notoriously difficult.

然而，时局的艰难已是不言而喻。

youdao

Milton's similes are notoriously difficult as you no doubt have already experienced.

弥尔顿的明喻众人皆知的,非常难懂，正如你们已经领教过的。

耶鲁公开课 - 弥尔顿课程节选

He was notoriously difficult to please and viewed people and products in black and white terms.

CNN: How Steve Jobs' legacy has changed

Anti-trust and monopolistic practices in the high tech industry have been notoriously difficult to regulate.

FORBES: Consumers Would Like To See Samsung And Apple Reconcile

Mobile TV has been a notoriously difficult nut to crack in the U.S. market.

FORBES: Is Qualcomm's FLO TV Sale A Sign It Can't Develop Its Own Businesses?