In difficulty of learning, music lies somewhere in between speaking and writing.

从学习难度上看，音乐在说话和写作的中间地带。

youdao

He tried to explain to me the difficulty of learning to cook from books.

他向我解释照着书本学习烹饪的困难。

youdao

Also,victims of the disease have increasing difficulty learning and storing new information.

VOA: special.2009.09.15

As for the difficulty of learning about our past, just recognize how incomplete the fossil record really is: The 280 million Americans alive today collectively have some 60 billion bones in their bodies.

FORBES: Fact and Comment

Casio has redesigned the ClassPad series' software keyboard to make this new model easier to use, organizing functions to correspond to three levels of learning difficulty, beginning with basic functions used by everyone like fractions, square roots, and trigonometric functions, then advanced functions like differential calculus, complex compound numbers, and sigma calculations, and finally even more advanced calculations including piecewise and user-defined formulas.

ENGADGET: Casio's touchscreen graphing calculator arrives in 2013, makes the TI-84+ look dated

The difficulty for marketers is creating the right kind of buzz and learning to control it.

ECONOMIST: Marketing: Building buzz | The