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1·He paused, apparently lost in thought.

他停顿下来，显然陷入了沉思。《牛津词典》

2·Monica was lost in thought.

莫妮卡陷入了沉思。

3·In those following quiet moments I was lost in thought.

在接下来那些安静的时刻，我陷入了沉思。

4·Lost in thought, he almost ran into the car in front of him.

由于陷入沉思中，他差点撞上了前面那辆车。

5·He stood for a long time lost in thought, and at last a curdling smile lit up his swarthy face.

他站在那里沉思了许久，最后一丝狞笑照亮了他黝黑的脸庞。

6·He sat there, lost in thought.

他坐在那里出神。《新英汉大辞典》

7·I'm always lost in thought.

我常常陷入思考。

8·The pretty girl was lost in thought.

这可爱的女孩陷入沉思之中。

9·Don't disturb. He is lost in thought.

别打扰他，他在沉思。

10·I was lost in thought when I felt a bump.

我想得出了神，这时，我感到被撞了一下。