Foil wrapping paper is beautiful but difficult to use.

锡箔包装纸好看却难用。

《柯林斯英汉双解大词典》

Formulas are easy to remember but difficult to use in working out math problems.

公式容易记，但在解决数学问题时却很难应用。

youdao

They were difficult to use and took a lot of space in a library.

它们难以使用，还占用了图书馆很大的空间。

youdao

This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.

VOA: special.2009.07.14

A little indirect but not so indirect that is difficult to understand. You should use this often.

有一点委婉，但不至于委婉到让人难以理解。应当尽量多使用这种句型。

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But it was often difficult. To protect their towns,the settlers often had to employ people who were expert in the use of firearms.

VOA: special.2010.03.10

Intangible assets, like patents and other intellectual property, are difficult to use as collateral.

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And while image quality may have improved, they seem as unreliable and difficult to use as ever.

FORBES: Why Do Printers Still Suck?

Fissile material in this form is difficult to use in a weapons program, U.S. and European officials say.

WSJ: Iran Talks Off to Shaky Start