他挺直腰，把双手插进衣兜里。
艾米挺直身子，举起了身上的担子。
双脚分开与肩同宽，双臂抱着婴儿。保持背部挺直，重复深膝弯曲。
Standing with feet shoulder-width apart and cradle baby with both arms. Keeping a straight back and repeat deep knee bends.
每当我试图弯腰让自己看起来更矮时，他就会告诉我：“挺直腰板，艾丽莎。”
Whenever I tried to bend myself in order to appear shorter, he would tell me, "Stand straight and tall, Alisa."
使双腿挺直，直到他们完全伸展开。
他换成了一个挺直的姿势。
我挺直了腰杆面对着他。
观看升国旗时，我们应该挺直腰背。
When watching the raising of the national flag, we should stand straight with our backs.
克拉拉挺直身子，在她的朋友身边稳步走着。
因此，通过挺直腰板，挺直肩膀来显示你对自己的信任是很重要的。
Therefore, it's important to show trust in yourself by standing up tall and putting your shoulders back.
穿过排列成行的挺直黑黑的树。
一个站得挺直，一个驼背。
上身要挺直，坚持几秒钟，然后换个脚。
With upper body straight, hold for a few seconds and move it to the side; hold and extend it behind you.
保持背部挺直，向上推你的手臂直到手臂伸直。
Keeping your back straight, push up with your arms until your arms are extended.
所以挺直腰板，继续学习，继续生活。
大步走，挺直腰，抬起头。
Walk with a purposeful stride, with your back straight and with your head held up high!
通常情况下，这意味着靠近攀岩绳一侧的腿要保持挺直。
Usually, this means a straight leg on the side of the rope going to the climber.
他解释说，倒退行走能帮助人收缩腹部，并且能保持背部挺直。
He explained that walking backward forces the tummy in and the back straight.
让手臂挺直。
站在镜子前或是让别人来检查你双肩的位置，看看双肩是否挺直。
To see if you're keeping your shoulders straight, stand in front of a mirror or ask someone else to evaluate your shoulder position.
在做这个动作时，双脚与肩同宽，背挺直，保持重心稳定。
To do a squat to biceps curl, you start with your feet about shoulder-width apart, spine straight and your core stable.
最棒的是，你从这种椅子上起身后，它会自动挺直，就好像是活的一样。
The best part of the chair is that after you stand up, it automatically straightens itself out. “It seems like it’s alive, ” he said.
你会注意到，他们渴望生活，眼睛里有某种东西在发光，身板挺直。
You would notice that they are eager toward life, there is a certain sparkle in their eye, an erectness to their carriage.
机械师挺直腰板，在抹布上擦了擦手，对他说道：“呃...您看看这个引擎。
The mechanic straightened up, wiped his hands on a rag and said, "So Doc, look at this engine.
当所长回来的时候，他身板挺直，表情严肃，象任何将要发布命令的长官一样。
When the inspector returned, he was straight-backed and solemn, like someone ready to give orders.
那么考虑下稍微拔蚀并修剪，以保持它们呈线形而又挺直，同时不失饱满和男子气概。
Consider a little plucking and trimming to keep them inline and straight while keeping them full and masculine.
挺直上升这样将开始拉长你的腿，使你的躯干变长同时避免上背部任何的拖沓。
Keep the length in your spine and begin to elongate over your legs, spreading your torso long and avoiding any rounding in the upper back.
挺直上升这样将开始拉长你的腿，使你的躯干变长同时避免上背部任何的拖沓。
Keep the length in your spine and begin to elongate over your legs, spreading your torso long and avoiding any rounding in the upper back.
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