想像一条把你的身体分成两半的垂直线——你的手不应该越过它。
Imagine a vertical line splitting your body in half — your hands should not cross it.
侧立于练习凳一侧，靠凳一侧的手与膝支撑于凳。背部与地面平行(与颈部成一条直线)，另一侧手手持哑铃，手臂垂直悬于体侧。
Stand side-on to a bench with your closest hand and knee on the bench, back parallel to the floor (neck in line) and a dumbbell in your other hand, arm hanging straight down.
这些二手书店精心收藏的珍本和绝版书籍，由于受到网络旧书交易的竞争和巴黎人阅读及购物习惯的改变，销售额直线下降。
Bouquinistes' sales have dived as their carefully collected stocks of rare and out-of-print books face competition from online dealers and a change in Parisians' reading and shopping habits.
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