Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

平行线置于锯齿形条纹背景，左氏错觉会让平行线看起来不平行。

Parallel lines are lines that never join.

平行线是永不相交的线。

There are two parallel lines.

这有两条平行线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平行线是在同一平面永不相交的线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格纸法、平行线法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平行线置于锯齿形条纹背景上，左氏让平行线看起来不平行。

Parallel lines are lines that never join.

平行线是永不相交的线。

There are two parallel lines.

这有两条平行线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平行线是在同一平面上永不相交的线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积法有格纸法、平行线法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平置于锯齿形条纹背景上，左氏错觉会让平起来不平。

Parallel lines are lines that never join.

平是永不相交。

There are two parallel lines.

这有两条平。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平是在同一平面上永不相交。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用面积方法有方格纸法、平法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平置于锯齿形纹背景上，左氏错觉会让平看起来不平。

Parallel lines are lines that never join.

平永不相交的。

There are two parallel lines.

这有平。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平在同一平面上永不相交的。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格纸法、平法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平行置于锯齿形条纹背景上，左氏错觉会让平行看起来不平行。

Parallel lines are lines that never join.

平行是永不相交。

There are two parallel lines.

有两条平行。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平行是平面上永不相交。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用量算面积方法有方格纸法、平行法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将行线置于锯齿形条纹背景上，左氏错觉会让行线看起来不行。

Parallel lines are lines that never join.

行线是永不线。

There are two parallel lines.

这有两条行线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 行线是在同上永不线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用量算积方法有方格纸法、行线法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

线置于锯齿形条纹背景，左氏错觉会让线看起来不。

Parallel lines are lines that never join.

线是永不相交的线。

There are two parallel lines.

这有两条线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 线是在同一面永不相交的线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格纸法、线法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将行线置于锯齿形条纹，左氏错觉会让行线看起来不行。

Parallel lines are lines that never join.

行线是永不相交的线。

There are two parallel lines.

这有两条行线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 行线是在同一面永不相交的线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格法、行线法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平置于锯齿形条纹背景上，左氏错觉会让平看起来平。

Parallel lines are lines that never join.

平永的。

There are two parallel lines.

这有两条平。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平在同一平面上永的。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格纸法、平法、求积仪法。

Zollner's illusion makes parallel lines seem to diverge by placing them on a zigzag-striped background.

将平行线置于锯齿形条纹背景上，左氏错觉会让平行线看起来不平行。

Parallel lines are lines that never join.

平行线是永不相交的线。

There are two parallel lines.

这有两条平行线。

Parallel lines are, by definition, lines on the same plane that never join.

按定义说, 平行线是在同一平面上永不相交的线。

Graph paper, parallel, and planimeter methods are current tools for acreage calculation.

目前常用的量算面积方法有方格纸法、平行线法、求积仪法。