Sit up straight. Don't slouch.

挺起胸坐直，别歪歪斜斜的。

《牛津高阶英汉双解词典》

Fold your arms and sit up straight!

两臂交叉,坐直!

辞典例句

Sit up straight and don't cross your legs or arms.

坐直、不要跷二郎腿或抱臂.

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Sit up straight and keep your arms on the table.

坐得要直,并将你的手臂防在桌子上.

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Please sit up straight, so you can breathe more easily.

请坐直, 所以你可以呼吸更容易.

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Please sit up straight.

请坐端正.

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Sit up straight . Don't slump!

坐直了,别垂头丧气的.

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Sit up straight: don't bend over your desk.

坐端正: 不要将身体俯伏在书桌上.

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Sit up straight at the table.

吃饭时要坐直.

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Sit up straight on your chair, Do not make any nose when you eat.

坐在椅子上要坐直, 当你吃东西的时候不要发出任何声音.

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Shave, use good grammar, be at least five minutes early, sit up straight. Don't mumble.

刮胡子, 应用好的语法, 早到五分钟, 坐直. 不要咕咕哝哝地说话.

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Don't slouch , sit up straight – but in a relaxed way, not a too tense manner.

不要萎靡不振, 要坐直——但是同时要放松, 不能太过紧张.

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Sitting : When sitting the celebrant is still presiding . Therefore, one should sit up straight in chair.

坐姿应坐直,双手应放在双膝上或合手放在大腿上.

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