Your back should remain straight and upright at all times.
你回直，并应保持直立在任何时候。
I had to sit on my stool with back straight and upright, correctly holding the brush, so I loved making random drawings.
而我却得挺着腰、直着背、握着笔、坐在小板凳上，所以我还是喜欢乱画。
Perhaps the crooked tree is no beautiful than the straight and upright tree, but the latter is interested and felled by carpenter.
歪斜的树也许不如挺直的树好看，但是挺直的树被木匠相中而砍伐。
Schoolmates all, the waist and back is straight and upright, two arms overlapping is ready for, listen to a teacher seriously give a lecture.
同学们都腰板挺直，两只胳膊重叠做好，认真的听老师讲课。
Pay attention to the posture at the some paper money, the health is straight and upright, the eyes It must keep eyeball and bank note from, put dual tactics elbow at tabletop.
点钞时注意姿式，身体挺直，眼睛和钞票保持一定距离，两手肘部放在桌面上。
Choose an upright chair and sit well back so that your spine is straight.
挑一把竖直的椅子，坐好，保持脊椎的挺直。
The bright fighter is frightened and flies upright in straight line from the right.
那架明亮的战斗机受到惊吓后呈直线地从右边垂直飞起来。
Sit upright. Hold left foot off the floor with left leg straight. Point toes up and downward. Repeat 3 - 5 times. Repeat with other side.
坐直。伸直左腿；将左脚离地。让脚趾朝上、下方向。重复3-5次。换另一边重复。
The bright fighter is frightened and flies upright in straight line from the right.
那架明亮的战斗机遭到惊吓后呈直线地从右面铅直飞起来。
Ask the patient to sit upright and still, holding the head straight.
要求患者坐直、静止，头部扶正。
The highest peak is straight and aloof and arrogant , 4 little summits surround upright around , are hoped , seem exactly one dodge the crown of silver light.
主峰挺拔孤傲，四座小峰环立周围，远远望去，恰似一顶闪着银光的皇冠。
The highest peak is straight and aloof and arrogant , 4 little summits surround upright around , are hoped , seem exactly one dodge the crown of silver light.
主峰挺拔孤傲，四座小峰环立周围，远远望去，恰似一顶闪着银光的皇冠。
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