should be perpendicular to the level set.
必须与水平集垂直。
The wall must be perpendicular to the floor.
墙壁必须与地板成直角。
For section displays, the cutting plane is assumed to be perpendicular to this line.
为显示指定一个浏览方向，切割平面假设与这条线垂直。
You might be able to draw curves that are perpendicular to it.
或许你可以画出每点都垂直于向量场的曲线。
Market of Chinese perpendicular website is impossible to be gobbled up by.
中国垂直网站市场不可能被一家吞噬。
Market of Chinese perpendicular website is impossible to be gobbled up by.
中国垂直网站市场不可能被一家吞噬。
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