When I looked at her in surprise, it turns out that she has been working hard to practice.

这时我吃惊地望着她，原来，她一直在努力地练习。

youdao

And the synergy that looks good on paper is proving hard to put into practice.

ECONOMIST: Brazil's affair with China is going off the boil

Increased diversification of their economies away from oil is an obvious solution but one that is hard to achieve in practice.

ECONOMIST: The suffering Gulf

That sounds good in theory but is hard to spot in practice.

ECONOMIST: The retired are always supported by their children