... crane truck起重机 pivot balance 平衡支枢 an adjustable-tap made by oneself for renovating inside thread 由个人设计的可以修理内部线路的可调接头 ...
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balance pivot 平衡支枢 ; 杠杆支点
pivot balance
主平衡
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Ballroom dancers tend to roll and pivot on the edges of their feet, using a series of muscles and tendons to achieve a balance and dexterity honed with years of practice.
CNN: Boston bombings destroy dancer's foot, but not her spirit
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