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

将置于锯齿形景上，左氏错觉会让看起来不。

Parallel lines are lines that never join.

是永不相交的。

There are two parallel lines.

这有两。

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

按定义说, 是在同一面上永不相交的。

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、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.

平行是永不相交的。

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、求积法。

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

将置于锯齿形条纹背景上，左氏错觉会让看起来不。

Parallel lines are lines that never join.

是永不相交的。

There are two parallel lines.

这有两条。

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

按定义说, 是在同一上永不相交的。

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

目前常用的积方法有方格纸法、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.

将线置于锯齿形条上，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、线法、求积仪法。

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，左氏错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.

目前常用的量算面法有格纸法、平行线法、求仪法。

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。