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1·Do not slump but sit straight.

不要暴跌，但坐直。

2·Turn three rounds and sit straight.

转三圈，然后坐好。

3·Sit straight, please.

请坐好。

4·Sit straight, please.

请坐正！

5·Stand or sit straight and breathe deeply.

站立或坐下深呼吸。

6·We should sit straight when we are studying.

当我们学习的时候，我们应该坐直。

7·He doesn't sit straight, his posture is very bad.

他坐得不正，他的姿势很糟糕。

8·He doesn't sit straight; his posture is very bad.

他坐得不正；他的姿势很糟糕。

9·I can sit straight today. The acupuncture is really great.

今天我可以坐直了。针灸的确很棒。

10·He doesn't sit straight, his posture is Very abundance bad.

他坐得不正，他的姿势很糟糕。