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1·Her head spins dizzily as soon as she sits up.

她一坐起来，就感到天旋地转。《柯林斯英汉双解大词典》

2·One man sits up in his bed for an hour each afternoon to help drain the fluid from his lungs.

男子每天下午在床上坐一个小时，以便排出肺部的液体。

3·He often sits up late.

他经常熬夜。

4·John sometimes sits up very late.

约翰有时很晚才睡。

5·He sits up, haunted.

他坐起身来，梦中的情景挥之不去。

6·He sits up, eyes wide.

他坐起身来，睁大眼看。

7·Blinking, Jake slowly sits up on the gurney.

闪回杰克慢慢地从病床上坐起来。

8·He sometimes sits up very late reading.

有时候他会看书看到深夜。

9·She sits up late.

她很晚才就寝。

10·CU JAKE's AVATAR — HIS EYES OPEN. He sits up.

特写杰克的阿凡达——他睁开眼睛，坐起身来。