She sat at the desk reading a newspaper.
她坐在桌子旁看报纸。
She sat down at her desk, booted up her computer, and watched as the screen flickered on.
她坐到电脑桌旁，启动电脑，看着屏幕不停地闪烁。
Then, during a maths lesson, she walked to the front of the class and sat on his lap as he sat at his desk.
一次数学课，他坐在讲台上讲课，这个女生走上前，坐在他大腿上。
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