To remove these borders, set the -outline property to be the same as the fill color; to widen the borders, use the -width property to specify their width in pixels.
要去除这些边框，设置-outline属性为与填充色相同即可；要加宽边框，使用- width属性来指定宽度(用像素表示)。
Borders range from 3 to 30 m wide and must be nearly level across their width so the entire area will be irrigated uniformly.
畦宽3—30米，沿宽度方向必须接近水平，以便使全部面积都能得到均匀的灌溉。
The fortress was well protected by thick and tall walls. Their width sometimes reached 20 m.
要塞被又厚又高的墙保护着，有些地方的墙甚至厚达20米。
The fortress was well protected by thick and tall walls. Their width sometimes reached 20 m.
要塞被又厚又高的墙保护着，有些地方的墙甚至厚达20米。
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