If you would kindly please to let me keep upright , sir, perhaps I shouldn't be sick.

先生,请你行行好,让我直起身子来, 免得恶心反胃.

辞典例句

For best results, keep upright posture so that your body and mind are well balanced.

为取得最佳效果, 冥想时最好保持直立姿势,这样你的身体和思想都可以保持平衡.

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