And it's not unusual for temperatures and precipitation levels to be higher or lower than normal. After all, that's how we end up with the artificial line called normal.
发生暴风天气是正常现象，并且气温和降水超出正常范围也不足为奇，毕竟，人为划定“正常范围”终会造成这样的结果。
The induced normal curvature of two conjugate tooth surfaces along normal direction of contact line is one of the important indexes evaluating mechanical transmission performances.
两共轭齿面沿接触线法向的诱导法曲率是衡量机械传动性能的重要指标之一。
In terms of the normal-wrapping installation, the normal is a straight line through the center point of linear framework.
对重叠回线装置而言，法线是垂直于回线平面、并通过线框中心点的一条直线。
In terms of the normal-wrapping installation, the normal is a straight line through the center point of linear framework.
对重叠回线装置而言，法线是垂直于回线平面、并通过线框中心点的一条直线。
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