Crack climbing is hell on your ankles and painful on your feet, so focus on speed and continuous movement; stalling in an uncomfortable position is the worst.
爬裂缝就是会毁脚腕而且脚会很疼，所以要保持速度注意动作的连贯性；在一个别扭的姿势上拖延是最不可取的。
The ability to work safely under live well conditions, with a continuous string, enables fluids to be pumped at any time regardless of the position or direction of travel.
在使用连续管柱的情况下，在含气油井条件下的安全工作能力使得流体在任何时刻都能被泵送而与位置和移动方向无关。
By using the discrete position base-vectors approximating for the continuous position base-vector, the discrete position presentation is constructed.
用离散的位置基矢作为连续位置基矢的近似，构建分立位置表象。
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