David is actively thinking hard about something.

David出神地想什么呢。

So I think hard power still counts.

因此我认为硬实力仍然是最重要的。

Harry stood for a moment, thinking hard.

哈利站在那里，苦苦地思索了片刻。

He had to think really hard there.

他觉得这很困难。

Think hard and you'll find the answer.

仔细想想，你就会找到答案的。

You want to help Kenzi? You think harder.

你想帮肯吉吗? 好好想想。

When we lie, we have to think really hard.

当我们撒谎时，我们必须非常努力地思考。

This expression means to think very hard about something.

这个词汇的意思是努力地去想某个问题。

Scarlett thought hard but Thermopylae meant nothing to her.

想想温泉关吧！" 思嘉苦思冥想了半天也没弄懂" 温泉关" 是什么意思。

I could see they had thought hard about this.

我看得出她们已经好好想过了。

The boy thought hard and long.

这个男孩子认真地想了很久。

Harry thought hard, picturing the scene on the night of Halloween.

哈利苦苦思索，回忆万圣节前夜的情景。

He ran a hand over his unshaven face, evidently thinking hard.

他用手抚摩着胡子碴的面颊，显得在苦苦思索着什么。

Are you kidding? That's what you always do. Think harder.

你逗谁呢? 这不是你一直做的事嘛。再想想。

But right now is not the time to think too hard.

但现在不是怪自己的时候。

How can you be sure? It was long ago. Think hard.

那么久了 你怎么能确定? 用力想。

He did not speak much to me, but was clearly thinking hard.

他对我讲话不多，但很明显地他在使劲想什么。

Harry stood for a moment, thinking hard. Then it came to him.

哈利站在那里，苦苦地思索了片刻。然后，他有了主意。

Most of us try very hard to not think hard about death.

大多数人非常努力地逃避认真思考死亡。

Or we can say to think hard or think long and hard.

或者我们可以说“努力思考”或“深思熟虑”。