They are on a steep learning curve.

他们学得很快。

《柯林斯英汉双解大词典》

Perhaps the power and depth of Eclipse means that you have a steep learning curve.

或许 Eclipse 的强大和深度意味着您学习起来会很费劲。

youdao

Ian survived basic training, but he faced a steep learning curve when it came to everyday Army life.

伊恩挺过了基础训练，但现在他又要重新面对日常正式军旅生活的挑战。

youdao

Just beware of the steep learning curve you may have to climb to start using them.

WSJ: From QWERTY to Quirky: New Ways to Type on Glass

But stenography is a steep learning curve and more difficult to learn than Qwerty.

BBC: Why do we all use Qwerty keyboards?

Some in the U.S. military see a steep learning curve ahead for the 350, 000 Afghan service personnel.

NPR: Fighting Season Is Testing Ground For Afghan Force