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- Parallel lines never join . 平行线永不相交。
- Parallel lines never join. 平行线永不相交。
- Parallel lines, by definition, never join. 根据定义，平行线永远不会相交。
- Parallel lines are lines that never join. 平行线是永不相交的线。
- Parallel lines are, by definition, lines that never join. 按照定义，平行线即永不相交的线。
- Parallel lines are, by definition, lines on the same plane that never join. 按照定义说, 平行线是在同一平面上永不相交的线。
- To a very good approximation, it is also the geometry of the world around us: parallel lines never meet, and all the rest of Euclid's axioms hold. 其实就一个极佳的近似而言，这个几何也是我们周遭这个世界的几何：平行线永远不会相交，而且欧几里得其馀的公设也都成立。
- Parallel lines never meet. 平行线永远不会相交。
- parallel lines never converge; concentric circles are parallel; dancers in two parallel rows. 平行线从不相交；同心圆是平行的；平行的两排舞蹈者。
- Parallel lines converge at infinity. 平行线永不相交。
- A pair of horizontal parallel lines drawn across a shield. 盾形纹章上的横条纹画在盾形纹章上的两条水平的平行线
- He'll never join in a strike; he's a company man. 他从不参加罢工，他是公司忠实的员工。
- Two parallel lines will never have an intersection point. 两条平行线是不可能有交点的。
- He never joined in the usual sports of the boys. 他从不参加孩子们的一般体育活动。
- He proved the existence of parallel lines. 他证明了平行线的存在性。
- A family of parallel lines cut the conic. 有一组平行线与圆锥曲线相交。
- The parallel lines appear to diverge. 这些平行线像是岔开了。
- He is very formal with everyone; he never joins in a laugh. 他对任何人都很拘谨，从不跟人说笑。
- Will two parallel lines hand over to order? 两条平行线会有交点吗?
- You should never join an electric wire to a water pipe. 你永远也不要把电线连接到水管上。
