身前的划水过中线易于使你的肘部下沉，而且破坏你的抓水和损害你的动力。
A cross over at the front of the stroke tends to cause your elbow to drop, also damaging your catch and hurting your propulsion.
身前的划水过中线造成你在水中蛇形，这会拉你偏离航向。
Crossing over at the front of the stroke causes you to snake in the water. This pulls you off course.
方法测量11例骨性下颌前突伴偏斜患者治疗前模型，将上颌腭中缝作为中线标准，测量牙弓两侧同名牙接触点到腭中缝的距离，观测牙弓的对称性。
Methods Measurement of 11 dental models was performed, midline of palate was defined as central line, the distance of every contact point to the midline was measured in each side.
标志着中线和前的立场。
K8前起落架两数据处理中，在分析了力学与数理方法的基础上，采用数理统计中线性回归的方法进行处理，其数学模型为多元线性回归方程。
The linear regression of mathematical statistics is used to deal with the two data of landing gear of K8 aircraft after the dynamics and mathematics are analyzed.
插管长度与前正中线相关回归方程式为：肠系膜上动脉（?）
The regression formulae to estimate the length of catheter were calculated from the anterior median line by means of regression analysis.
闸前常水位和控制容量方式是中线最合适的控制方式。
Maintaining constant water levels at sluices and controlling water storage capacities of all channel reaches are the most suitable control modes.
闸前常水位和控制容量方式是中线最合适的控制方式。
Maintaining constant water levels at sluices and controlling water storage capacities of all channel reaches are the most suitable control modes.
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