Why does the touch screen respond after very long time sometimes?

触摸屏为什么有时响应时间会很长？

youdao

He was unhappy when he sold his violin. After all, he had had it for a very long time.

卖掉小提琴时他很不高兴。毕竟，他拥有了这个小提琴好久。

youdao

It is very relaxing for me to lie on a soft sofa after a long time of study.

经过长时间的学习，躺在柔软的沙发上让我很放松。

youdao

That meant the drug might be effective at reversing atherosclerosis--something drugs like Lipitor and Zocor only do after a very long time.

FORBES: Health

We had evidence that they had a lot of bad stuff for a very long time which we discovered after the first Gulf War.

CNN: Transcript of Thursday's Democratic presidential debate

Pensions are seen as a hugely complicated area of money, and hugely emotional since, for most of us, the income we receive from our pensions will be needed to keep us going for a very long time, hopefully, after we give up work.

BBC: Fergus Muirhead