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。

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.

将平行线置形条纹背景上，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.

目前常用的量算面方法有方格纸法、平行线法、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，左氏错觉会让平行线看起来平行。

Parallel lines are lines that never join.

平行线是交的线。

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, 平行线是在同一平交的线。

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

目前常用的量算积方法有方格纸法、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.

平行永不相交的。

There are two parallel lines.

有条平行。

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

按定义说, 平行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.

将行置于锯齿形条纹背景上，左氏错觉会让行看起来不行。

Parallel lines are lines that never join.

行是永不相。

There are two parallel lines.

这有两条行。

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

按定义说, 行是在面上永不相。

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、行法、求积仪法。

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

将行置于锯齿形条纹背景上，左氏错觉会让行看起来不行。

Parallel lines are lines that never join.

行是永不相。

There are two parallel lines.

这有两条行。

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

按定义说, 行是在面上永不相。

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、行法、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，左氏错觉会让平行来不平行。

Parallel lines are lines that never join.

平行是永不相交。

There are two parallel lines.

这有两条平行。

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。