请背对背站着。
Stand back to back and let's see who's taller.
背靠背站好，看看谁的个子高。
Stand back to back and we'll see which of you is tall.
背靠背站著，这样我们就能看出你们俩哪一个高了。
As you stand, maintain the natural curve in your lower back and keep your core muscles tight. Use your leg muscles - not your back - to lift the object.
在你站起来的时候，继续保持腰背部的自然曲线，保持收紧你的核心肌肉。用你的腿部肌肉——不是背部——去抬起物品。
The lumbar curve in the lower back, which helps us maintain our balance as we stand and walk, also leaves us vulnerable to lower back pain and strain.
腰部脊椎帮助我们在站立和行走的时候保持平衡，当同时也使得我们的背部更易疼痛。
One person standing alone is easily attacked and defeated, but two can stand back-to-back and conquer.
一个人遭受攻击易被击败，但两个人背靠背就容易取胜。
他们背对背站着。
When placed back to back with the tallest of the boat's crew, he tried his best to edge on higher ground, and to stand on tiptoe.
当他与我们船上个子最高的船员背靠背站着，他还踮着脚尽力站上更高的地方。
When placed back to back with the tallest of the boat's crew, he tried his best to edge on higher ground, and to stand on tiptoe.
当他与我们船上个子最高的船员背靠背站着，他还踮着脚尽力站上更高的地方。
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